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Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring.
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Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
Shank | ||||||||||
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Size | Decimal Size Equivalent | No. of Sizes | Overall Lg. | For Max. Material Thick. | Type | Size | Point Style | For Use On | Each | |
Inch | ||||||||||
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/8" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 1/4" | 1/4" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
1/4", 7/8", 1 1/8" | 0.25", 0.875", 1.125" | 3 | 3" | 3/32" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 7/8" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8" | 0.8125", 0.875", 0.9375", 1", 1.0625", 1.125", 1.1875", 1.25", 1.3125", 1.375" | 10 | 3" | 1/8" | Hex | 1/2" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
Uncoated High-Speed Steel | ||||||||||
1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/8" | Hex | 1/4" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 3/8" | 1/4" | Hex | 1/4" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8" | 0.25", 0.375", 0.5", 0.625", 0.75", 0.875", 1", 1.125", 1.25", 1.375" | 10 | 3 1/8" | 1/8" | Hex | 7/16" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 1/2" | 1/8" | Hex | 7/16" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8" | 0.8125", 0.875", 0.9375", 1", 1.0625", 1.125", 1.1875", 1.25", 1.3125", 1.375" | 10 | 2 1/8" | 1/8" | Hex | 7/16" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
7/8", 1 1/8" | 0.875", 1.125" | 2 | 3" | 1/8" | Hex | 7/16" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
Metric | ||||||||||
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
4.0 mm, 5.0 mm, 6.0 mm, 7.0 mm, 8.0 mm, 9.0 mm, 10.0 mm, 11.0 mm, 12.0 mm | 0.1575", 0.1968", 0.2362", 0.2756", 0.315", 0.3543", 0.3937", 0.4331", 0.4724" | 9 | 83mm | 5mm | Hex | 6.5mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661" | 10 | 76mm | 5mm | Hex | 10mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
5.0 mm, 7.5 mm, 10.0 mm, 13.0 mm, 16.0 mm, 19.0 mm, 21.0 mm, 23.0 mm, 26.0 mm, 29.0 mm, 31.0 mm, 33.0 mm, 35.0 mm | 0.1968", 0.2953", 0.3937", 0.5118", 0.6299", 0.748", 0.8268", 0.9055", 1.0236", 1.1417", 1.2205", 1.2992", 1.378" | 13 | 79mm | 4mm | Hex | 11.1mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm | 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087" | 7 | 64mm | 5mm | Hex | 10mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
Uncoated High-Speed Steel | ||||||||||
4.0 mm, 5.0 mm, 6.0 mm, 7.0 mm, 8.0 mm, 9.0 mm, 10.0 mm, 11.0 mm, 12.0 mm | 0.1575", 0.1968", 0.2362", 0.2756", 0.315", 0.3543", 0.3937", 0.4331", 0.4724" | 9 | 83mm | 5mm | Hex | 6.5mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724" | 5 | 86mm | 11mm | Hex | 6.5mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661" | 10 | 76mm | 5mm | Hex | 10mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
5.0 mm, 7.5 mm, 10.0 mm, 13.0 mm, 16.0 mm, 19.0 mm, 21.0 mm, 23.0 mm, 26.0 mm, 29.0 mm, 31.0 mm, 33.0 mm, 35.0 mm | 0.1968", 0.2953", 0.3937", 0.5118", 0.6299", 0.748", 0.8268", 0.9055", 1.0236", 1.1417", 1.2205", 1.2992", 1.378" | 13 | 79mm | 4mm | Hex | 11.1mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm | 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087" | 7 | 64mm | 5mm | Hex | 10mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm, 24.0 mm | 0.5512", 0.6299", 0.7087", 0.7874", 0.8661", 0.9449" | 6 | 64mm | 5mm | Hex | 11.1mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
20.0 mm, 22.0 mm, 24.0 mm, 26.0 mm, 28.0 mm, 30.0 mm, 32.0 mm, 34.0 mm | 0.7874", 0.8661", 0.9449", 1.0236", 1.1024", 1.1811", 1.2598", 1.3386" | 8 | 54mm | 5mm | Hex | 11.1mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life. Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
Shank | ||||||||||
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Size | Decimal Size Equivalent | No. of Sizes | Overall Lg. | For Max. Material Thick. | Type | Size | Point Style | For Use On | Each | |
Inch | ||||||||||
Uncoated Cobalt Steel | ||||||||||
1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/2" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 3/8" | 1/2" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 7/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 3/4" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 1/2" | 1" | Hex | 7/16" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
7/8", 1 1/8" | 0.875", 1.125" | 2 | 3" | 1 1/8" | Hex | 7/16" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Place a washer (not included) with an ID of the desired hole size over the bit and it acts as a stop to prevent the bit from drilling a larger hole.
Style A do not require a pilot hole.
Style B require a 1 29/64” pilot hole to start drilling.
Shank | |||||||||||
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Style | Size | Size Decimal Equivalent | Overall Lg. | For Max. Material Thick. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Inch | |||||||||||
Black-Oxide High-Speed Steel | |||||||||||
A | 1/8"-9/16" | 0.125"-0.5625" | 2 1/4" | 1/16" | 0.08" | Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 000000 |
A | 1/4"-13/16" | 0.25"-0.8125" | 2 3/4" | 1/16" | 0.08" | Round | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
A | 5/8"-1 3/16" | 0.625"-1.1875" | 3" | 1/16" | 0.08" | Round | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
A | 1"-1 5/8" | 1"-1.625" | 3 1/4" | 1/16" | 0.08" | Round | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
B | 1 1/2"-2 1/16" | 1.5"-2.0625" | 2 3/4" | 1/16" | 0.08" | Round | 1/2" | __ | Steel, Iron, Stainless Steel | 0000000 | 000000 |
Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
Number of Pieces | Drill Bit Sizes Included | Shank Type | Point Style | For Use On | Each | |
Inch | ||||||
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Uncoated High-Speed Steel | ||||||
3 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4" | Hex | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
4 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 3/16"-7/8", 13/16"-1 3/8" | Hex | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||
3 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4" | Hex | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
Often called step drill bits, these drill and counterbore holes at the same time. After drilling and counterboring, tap the hole and install your fastener. The body diameter may decrease after multiple sharpenings.
Dia. | Lg. | |||||||
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For Screw Size | Body | Step | Step | Overall | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | ||||||||
No. 6 | 0.250" | 0.15" | 1/2" | 4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
No. 8 | 0.290" | 0.178" | 1/2" | 4 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
No. 10 | 0.332" | 0.204" | 5/8" | 4 3/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
1/4" | 0.406" | 0.281" | 11/16" | 5 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
5/16" | 0.500" | 0.344" | 3/4" | 6" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
3/8" | 0.594" | 0.406" | 7/8" | 7 1/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
7/16" | 0.688" | 0.469" | 1" | 7 5/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
1/2" | 0.781" | 0.531" | 1" | 9 7/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
Dia. | Lg. | 82° Countersink Angle | |||||||
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For Screw Size | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
2 Flute | |||||||||
No. 6 | 0.281" | 0.142" | 1/2" | 4 1/4" | 0.2813" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
No. 8 | 0.332" | 0.169" | 1/2" | 4 3/4" | 0.3320" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
No. 10 | 0.386" | 0.196" | 5/8" | 5 1/8" | 0.3860" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
1/4" | 0.500" | 0.257" | 11/16" | 6" | 0.5000" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
5/16" | 0.625" | 0.320" | 3/4" | 7 1/8" | 0.6250" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
3/8" | 0.750" | 0.383" | 7/8" | 5" | 0.7500" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
7/16" | 0.813" | 0.446" | 1" | 5 1/4" | 0.8125" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
1/2" | 0.875" | 0.510" | 1" | 5 1/2" | 0.8750" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |