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    118 Products
    About Countersinks
    industrial info icon

    Choose the right countersink angle, body diameter, and number of flutes for your application.

    Drill-Bit Countersinks for Wood and Plastic

    These countersinks attach at various points along the drill bit, so one tool will drill countersunk holes for screws of different lengths. They're designed to cut a smooth and even finish in wood and plastic on the first pass.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Drill-Bit Countersink, 1 Countersinking End, For Wood, For Cutting Screw Holes, Sold Individually, Straight Flute, 4 Flutes.

    4 Flutes

    The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Countersinks
    Counterbore Collars
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    		3/4"00000000000001/2"1/4"000000000000
    5/16"7/64"No. 4
    		3/4"0000000000009/16"1/4"00000000000
    3/8"1/8"No. 5
    		7/8"0000000000005/8"1/4"00000000000
    3/8"9/64"No. 6
    		7/8"0000000000005/8"1/4"00000000000
    3/8"5/32"No. 7
    		7/8"0000000000005/8"1/4"00000000000
    3/8"11/64"No. 8
    		7/8"0000000000005/8"1/4"00000000000
    3/8"3/16"No. 9
    		7/8"0000000000005/8"1/4"00000000000
    3/8"13/64"No. 10
    		7/8"0000000000005/8"1/4"00000000000
    3/8"7/32"No. 12
    		7/8"0000000000005/8"1/4"00000000000
    7/16"13/64"No. 10
    		7/8"00000000000011/16"1/4"00000000000
    1/2"5/32"No. 7
    		7/8"0000000000003/4"1/4"00000000000
    1/2"3/16"No. 9
    		7/8"0000000000003/4"1/4"00000000000
    1/2"13/64"No. 10
    		7/8"0000000000003/4"1/4"00000000000
    1/2"7/32"No. 12
    		7/8"0000000000003/4"1/4"00000000000
    1/2"1/4"No. 14
    		7/8"0000000000003/4"1/4"00000000000
    5/8"3/16"No. 9
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"1/4"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"9/32"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"5/16"No. 18
    		1 1/16"0000000000007/8"1/4"00000000000
     
    90° Countersink Angle
    1/4"3/32"No. 3
    		3/4"0000000000001/2"1/4"00000000000
    5/16"7/64"No. 4
    		3/4"0000000000009/16"1/4"00000000000
    3/8"1/8"No. 5
    		7/8"0000000000005/8"1/4"00000000000
    3/8"9/64"No. 6
    		7/8"0000000000005/8"1/4"00000000000
    3/8"5/32"No. 7
    		7/8"0000000000005/8"1/4"00000000000
    3/8"11/64"No. 8
    		7/8"0000000000005/8"1/4"00000000000
    3/8"3/16"No. 9
    		7/8"0000000000005/8"1/4"00000000000
    3/8"13/64"No. 10
    		7/8"0000000000005/8"1/4"00000000000
    3/8"7/32"No. 12
    		7/8"0000000000005/8"1/4"00000000000
    7/16"13/64"No. 10
    		7/8"00000000000011/16"1/4"00000000000
    1/2"5/32"No. 7
    		7/8"0000000000003/4"1/4"00000000000
    1/2"3/16"No. 9
    		7/8"0000000000003/4"1/4"00000000000
    1/2"13/64"No. 10
    		7/8"0000000000003/4"1/4"00000000000
    1/2"7/32"No. 12
    		7/8"0000000000003/4"1/4"00000000000
    1/2"1/4"No. 14
    		7/8"0000000000003/4"1/4"00000000000
    5/8"3/16"No. 9
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"1/4"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"9/32"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"5/16"No. 18
    		1 1/16"0000000000007/8"1/4"00000000000
     
    Carbon Steel
    Image of Product. Front orientation. Countersinks. Drill-Bit Countersink, 1 Countersinking End, For Wood, For Cutting Screw Holes, Sold Individually, Straight Flute, 4 Flutes.

    4 Flutes

    Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.
    Countersinks
    Counterbore Collars
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    		3/4"00000000000001/2"1/4"000000000000
    5/16"7/64"No. 4
    		7/8"0000000000009/16"1/4"00000000000
    3/8"1/8"No. 5
    		7/8"000000000005/8"1/4"00000000000
    3/8"9/64"No. 6
    		7/8"000000000005/8"1/4"00000000000
    3/8"5/32"No. 7
    		7/8"000000000005/8"1/4"00000000000
    3/8"11/64"No. 8
    		7/8"000000000005/8"1/4"00000000000
    3/8"3/16"No. 9
    		7/8"000000000005/8"1/4"00000000000
    3/8"13/64"No. 10
    		7/8"000000000005/8"1/4"00000000000
    3/8"7/32"No. 12
    		7/8"000000000005/8"1/4"00000000000
    7/16"13/64"No. 10
    		7/8"00000000000011/16"1/4"00000000000
    1/2"5/32"No. 7
    		7/8"0000000000003/4"1/4"00000000000
    1/2"3/16"No. 9
    		7/8"0000000000003/4"1/4"00000000000
    1/2"13/64"No. 10
    		7/8"0000000000003/4"1/4"00000000000
    1/2"7/32"No. 12
    		7/8"0000000000003/4"1/4"00000000000
    1/2"1/4"No. 14
    		7/8"0000000000003/4"1/4"00000000000
    5/8"3/16"No. 9
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"1/4"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"9/32"No. 16
    		1 1/16"0000000000007/8"1/4"00000000000
    5/8"5/16"No. 18
    		1 1/16"0000000000007/8"1/4"00000000000
     

    Quick-Change Hex Drill-Bit Countersinks for Wood and Plastic

    Switch bits instead of tools to simplify jobs. These snap directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. You can slide the countersink up and down the drill bit and then secure it with a set screw, so one tool will drill countersunk holes for screws of different lengths. These countersinks cut a smooth and even finish in wood and plastic on the first pass.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. For Cutting Screw Holes, Drill-Bit Countersink, For Wood, Straight Flute, Quick-Change Hex Shank, Sold Individually, 1 Countersinking End, 2 Flutes.

    2 Flutes

    The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Countersinks
    Replacement
    Drill Bits
    For
    Screw Size
    Uncoated
    Body
    Dia.
    Max. Hole
    Drilling Dp.
    Hard
    Wood
    Soft
    Wood
    Overall
    Lg.
    Shank
    Size
    Shank Type
    Each
    Each
    2 Flutes
     
    82° Countersink Angle
    1/2"1"—No. 6
    		2 11/16"1/4"Quick-Change Hex000000000000000000000000
    1/2"1"No. 4
    		—2 9/16"1/4"Quick-Change Hex0000000000000000000000
    1/2"1"No. 6
    		No. 8
    		2 27/32"1/4"Quick-Change Hex0000000000000000000000
    1/2"1"No. 8
    		No. 10
    		2 31/32"1/4"Quick-Change Hex0000000000000000000000
    1/2"1"No. 10
    		No. 12
    		3 3/32"1/4"Quick-Change Hex0000000000000000000000
     

    Drill-Bit Countersink Sets for Wood and Plastic

    Image of Product. Front orientation. Countersinks. Sold as Sets, For Wood, Drill-Bit Countersink, Straight Flute, For Cutting Screw Holes, 1 Countersinking End.
    These countersinks attach at various points along the drill bit, so one tool will drill countersunk holes for screws of different lengths. They're designed to cut a smooth and even finish in wood and plastic on the first pass.
    High-Speed Steel—The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Carbon Steel—Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.
    82°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    For Drill Bit Size
    Finish
    Container
    Type
    Each
    High-Speed Steel
    43/8", 7/16", 1/2"71/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"UncoatedWood Stand00000000000000
    43/8", 7/16", 1/2", 5/8"141/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"UncoatedWood Stand0000000000000
     
    Carbon Steel
    43/8", 7/16", 1/2"71/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"UncoatedWood Stand000000000000
    43/8", 7/16", 1/2", 5/8"141/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"UncoatedWood Stand0000000000000
     

    Drill-Bit Counterbore Sets for Wood

    Image of Product. Front orientation. Counterbores. Drill-Bit Counterbore Sets for Wood.
    Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.
    Body Dia.
    No. of
    Pieces
    Container
    Type
    Each
    Uncoated Steel
    3/46", 1/4", 5/16", 3/8", 7/16", 1/2"6Wood Stand00000000000000
     

    Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood

    Image of Product. Front orientation. ZoomedIn view. Counterbores. Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood.
    With thin cutting edges to minimize contact with the hole, these counterbores make smooth, accurate cuts at high speeds. Attach them to any drill bit with a 1/2" shank and a cutting diameter of 1/2" or larger. They move up and down the drill bit and lock into place with set screws to match the length of the screw you're installing.
    Carbon Steel
    Uncoated
    Body
    Dia.
    Overall
    Lg.
    For Shank
    Dia.
    For Min. Drill
    Bit Cutting Dia.
    Each
    1 1/8"1"1/2"1/2"0000000000000
    1 1/4"1"1/2"1/2"000000000000
    1 3/8"1"1/2"1/2"000000000000
    1 1/2"1"1/2"1/2"000000000000
    1 3/4"1"1/2"1/2"0000000000000
    2"1 1/4"1/2"1/2"0000000000000
    2 1/2"1 1/4"1/2"1/2"0000000000000
     

    Quick-Change Hex Drill-Bit Counterbores for Wood

    Image of ProductInUse. Shown with Optional Drill Stop (Sold Separately). Front orientation. Counterbores. Quick-Change Hex Drill-Bit Counterbores for Wood.

    Shown with Optional Drill

    Stop (Sold Separately)

    Pop the 1/4" hex shank into a drill chuck, power screwdriver, or impact driver to drill and counterbore a hole in a single step. These counterbores move along the included drill bit and lock into place with set screws to match the length of the screw you're installing.
    Steel
    Image of Product. Front orientation. Counterbores. Quick-Change Hex Drill-Bit Counterbores for Wood.
    Image of Product. Front orientation. Drill Stops.

    Stops

    Stops—Attach with a set screw to stop the counterbore at the exact depth you need. These stops have a ring on the end that rotates separately from the body. When the ring touches your workpiece, it stops spinning to prevent scratches and dents. An opening in the side clears chips from the hole as you cut.
    Counterbores
    Stops
    Replacement
    Drill Bits
    Shank
    Black Oxide
    Body
    Dia.
    Overall
    Lg.
    Size
    Type
    No. of
    Flutes
    Max. Hole
    Drilling Dp.
    Drill Bit
    Size
    Each
    Each
    Each
    3/8"2 7/8"1/4"Quick-Change Hex31.1"1/8"
    		00000000000000000000000000000000000000
    1/2"2 7/8"1/4"Quick-Change Hex31.2"1/8"
    		00000000000000000000000000000000000
    5/8"3 1/4"1/4"Quick-Change Hex31.3"3/16"
    		000000000000———000000000000
    5/8"3 21/32"1/4"Quick-Change Hex32.7"1/4"
    		0000000000000———000000000000
    3/4"3 1/4"1/4"Quick-Change Hex31.3"3/16"
    		000000000000———000000000000
    3/4"3 5/8"1/4"Quick-Change Hex31.6"1/4"
    		000000000000———000000000000
    3/4"3 31/32"1/4"Quick-Change Hex33"5/16"
    		0000000000000———000000000000
    1"4 11/16"1/4"Quick-Change Hex33.7"7/16"
    		0000000000000———0000000000000
     

    Quick-Change Combination Countersinking Drill/Screwdriver Bit Sets

    Image of ProductInUse. Front orientation. Contains Annotated, Border, MultipleImages. Drill/Screwdriver Bits. Quick-Change Combination Countersinking Drill/Screwdriver Bit Sets.
    Image of Product. Front orientation. Drill/Screwdriver Bits. Quick-Change Combination Countersinking Drill/Screwdriver Bit Sets.
    Fasten differently sized screws with these sets. They save you the effort of switching three separate bits in and out of a power tool, instead letting you flip between a countersinking drill and a screwdriver bit with a single hand. You can also attach your own countersinking drills and screwdriver bits as long as they have a 1/4” hex shank.
    Countersinking drills have an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
    Drill/Screwdriver Bits
    Replacement
    3/32" Drill Bits
    Replacement
    7/64" Drill Bits
    No. of
    Pieces
    Includes
    Countersink
    Angle
    Countersink
    Body Dia.
    No. of Countersink
    Flutes
    Adapter Hex
    Shank Size
    For Use On
    Each
    Each
    Each
    Black-Oxide High-Speed Steel Countersink
    111 Drill-Bit Countersink for 3/32" Drill Bit
    1 Drill-Bit Countersink for 7/64" Drill Bit
    1 Drill Bit (3/32" Drill Bit Size)
    2 Drill Bits (7/64" Drill Bit Size)
    1 Phillips No. 1 Screwdriver Bit (1" O'all Lg.)
    2 Phillips No. 2 Screwdriver Bits (1" O'all Lg.)
    1 Reversible Shaft
    1 Adapter
    1 Hex L-Key    		82°
    		3/8"45/16"Aluminum, Fiberglass, Plastic, Wood0000000000000000000000000000000000000
     

    Quick-Change Combination Countersinking Drill/Screwdriver Bits

    Image of ProductInUse. Front orientation. Contains Annotated, Border, MultipleImages. Drill/Screwdriver Bits. Quick-Change Combination Countersinking Drill/Screwdriver Bits.
    Image of Product. Front orientation. Drill/Screwdriver Bits. Quick-Change Combination Countersinking Drill/Screwdriver Bits.
    Drill, countersink, and drive screws without switching three separate bits in and out of your power tool. With a single hand, flip between drilling countersunk holes and driving screws. The countersinking drill and screwdriver bit are secured with set screws, so you can switch them out for any bits with a 1/4” hex shank.
    The countersinking drill has an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
    Drill/Screwdriver Bits
    Replacement
    7/64" Drill Bits
    Replacement
    1/8" Drill Bits
    For Screw
    Size
    Drill Bit
    Size
    Countersink
    Body Dia.
    Max. Hole
    Drilling Dp.
    Countersink
    Angle
    Screwdriver
    Bit Size
    For Drive
    Style
    Adapter Hex
    Shank Size
    Adapter
    Lg.
    For Use On
    Each
    Each
    Each
    Black-Oxide High-Speed Steel Countersink
     
    4 Countersink Flutes
    No. 8
    		7/64"
    		3/8"2"82°
    		No. 2Phillips
    		5/16"3 3/4"Aluminum, Fiberglass, Plastic, Wood0000000000000000000000000———0
    No. 10
    		1/8"
    		3/8"2 1/4"82°
    		No. 2Phillips
    		5/16"3 3/4"Aluminum, Fiberglass, Plastic, Wood000000000000———0000000000000
     

    Drill-Bit Counterbores for Wood

    Image of ProductInUse. Shown with Drill Bit (Sold Separately). Front orientation. Counterbores. Drill-Bit Counterbores for Wood.

    Shown with Drill Bit (Sold

    Separately)

    Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.
    Steel
    Image of Product. Front orientation. Counterbores. Drill-Bit Counterbores for Wood.
    Image of Product. Front orientation. Counterbore Collars.

    Counterbore

    Collars

    Counterbore Collars—Attach with a set screw to stop the counterbore at the exact depth you need.
    Counterbores
    Counterbore Collars
    Uncoated
    Body
    Dia.
    Overall
    Lg.
    No. of
    Flutes
    For Drill
    Bit Size
    Each
    OD
    Wd.
    Each
    5/8"1"43/16"00000000000007/8"1/4"000000000000
    5/8"1"41/4"0000000000007/8"1/4"00000000000
    3/4"1"41/4"0000000000001"1/4"00000000000
    3/4"1 1/8"45/16"0000000000001"1/4"00000000000
    7/8"1 1/4"43/8"0000000000001 1/8"1/4"00000000000
    1"1 3/8"47/16"0000000000001 1/4"5/16"00000000000
    1 1/8"1 1/2"41/2"0000000000001 3/8"5/16"00000000000
    1 1/4"1 5/8"49/16"0000000000001 1/2"3/8"00000000000
     
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