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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
High-Speed Steel Step Drill Bits
Standard |
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Type | Size | Drill Bit Point Type | Each | |||
Black Oxide | |||||||||
| 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" | 3" | Round/3-Flat | 3/8" | Standard | 5910N14 | 000000 | ||
| 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" | 3 1/8" | Round/3-Flat | 3/8" | Standard | 5910N15 | 000000 | ||
| 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 3 1/4" | Round/3-Flat | 1/2" | Standard | 5910N17 | 00000 | ||
| 7/8", 1", 1 1/8", 1 1/4", 1 3/8" | 0.875", 1", 1.125", 1.25", 1.375" | 3" | Round/3-Flat | 3/8" | Standard | 5910N18 | 000000 | ||
Titanium Nitride (TiN) Coated | |||||||||
| 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" | 3" | Hex | 3/8" | Standard | 89315A42 | 00000 | ||
| 1/4", 7/8", 1 1/8" | 0.25", 0.875", 1.125" | 3" | Hex | 3/8" | Standard | 89315A45 | 000000 | ||
| 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" | 2 7/8" | Hex | 3/8" | Standard | 89315A44 | 00000 | ||
Uncoated | |||||||||
| 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" | 3" | Hex | 3/8" | Standard | 8841A24 | 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" | 3 1/8" | Hex | 3/8" | Standard | 8841A25 | 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" | 2 1/2" | Hex | 3/8" | Standard | 8841A33 | 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" | 2 1/8" | Hex | 3/8" | Standard | 8841A34 | 000000 | ||
| 7/8", 1 1/8" | 0.875", 1.125" | 3" | Hex | 3/8" | Standard | 8841A35 | 00000 | ||
Reduced-Shank High-Speed Steel Drill Bits
Jobbers' Length | Extended Length | Standard |
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Each | |||
Jobbers' Length | ||||||||||
Black Oxide | ||||||||||
| 7/8" | 0.875" | 6" | 2.1" | Reduced Round | 1/2" | Standard | 2933A37 | 000000 | ||
| 7/8" | 0.875" | 6" | 2.1" | Reduced Round/3-Flat | 1/2" | Standard | 29415A46 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||
| 7/8" | 0.875" | 6" | 3.13" | Reduced Round | 1/2" | Standard | 8512A46 | 00000 | ||
Extended Length | ||||||||||
Black Oxide | ||||||||||
| 7/8" | 0.875" | 12" | 9" | Reduced Round | 1/2" | Standard | 2464A28 | 000000 | ||
| 7/8" | 0.875" | 18" | 12" | Reduced Round | 1/2" | Standard | 2464A58 | 000000 | ||
Cobalt Steel Step Drill Bits
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Type | Size | Drill Bit Point Type | Each | |||
Uncoated | |||||||||
| 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" | 3" | 3-Flat | 3/8" | Standard | 8841A53 | 000000 | ||
| 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" | 2 1/2" | 3-Flat | 3/8" | Standard | 8841A55 | 00000 | ||
| 7/8", 1 1/8" | 0.875", 1.125" | 3" | 3-Flat | 3/8" | Standard | 8841A56 | 000000 | ||
High-Speed Steel Drill Bits
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Each | |||
Jobbers' Length | ||||||||||
Black Oxide | ||||||||||
| 7/8" | 0.875" | 10" | 4.81" | Morse Taper | Morse 2 | Standard | 2929A511 | 0000000 | ||
| 7/8" | 0.875" | 10 3/4" | 4.81" | Morse Taper | Morse 3 | Standard | 2929A424 | 000000 | ||
Short Length | ||||||||||
Uncoated | ||||||||||
| 7/8" | 0.875" | 5 1/2" | 2.18" | Round | 7/8" | Standard | 8947A257 | 00000 | ||
Extended Length | ||||||||||
Black Oxide | ||||||||||
| 7/8" | 0.875" | 10" | 4.81" | Round | 7/8" | Standard | 29315A212 | 00000 | ||
| 7/8" | 0.875" | 18" | 11.25" | Round | 7/8" | Standard | 2955A49 | 000000 | ||
Carbide-Tipped Drill Bits for Masonry and Concrete
SDS-Plus Shank for Hammer and Rotary Drilling
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SDS-Plus Shank |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||
Standard Point | ||||||||
| 7/8" | 0.875" | 9 3/4" | 7" | ANSI B212.15 | 8948A45 | 000000 | ||
| 7/8" | 0.875" | 12 3/4" | 10" | ANSI B212.15 | 8948A46 | 00000 | ||
| 7/8" | 0.875" | 18 3/4" | 16" | ANSI B212.15 | 8948A47 | 00000 | ||
Multipoint | ||||||||
| 7/8" | 0.875" | 8" | 6" | ANSI B212.15 | 2648N22 | 00000 | ||
| 7/8" | 0.875" | 14" | 12" | ANSI B212.15 | 2648N23 | 00000 | ||
| 7/8" | 0.875" | 18" | 16" | ANSI B212.15 | 2648N24 | 00000 | ||
| 7/8" | 0.875" | 38" | 36" | ANSI B212.15 | 2648N25 | 000000 | ||
SDS-Max Shank for Hammer and Rotary Drilling
Spline Shank for Hammer and Rotary Drilling
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Spline Shank |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||
Standard Point | ||||||||
| 7/8" | 0.875" | 14" | 8" | ANSI B212.15 | 8783A17 | 000000 | ||
| 7/8" | 0.875" | 18" | 12" | ANSI B212.15 | 8783A31 | 00000 | ||
| 7/8" | 0.875" | 22" | 16" | ANSI B212.15 | 8783A32 | 00000 | ||
| 7/8" | 0.875" | 28" | 22" | ANSI B212.15 | 8783A82 | 000000 | ||
Multipoint | ||||||||
| 7/8" | 0.875" | 14" | 8" | ANSI B212.15 | 8809A18 | 00000 | ||
| 7/8" | 0.875" | 18" | 12" | ANSI B212.15 | 8809A19 | 00000 | ||
| 7/8" | 0.875" | 42" | 36" | ANSI B212.15 | 8783A83 | 000000 | ||
Round Shank for Hammer and Rotary Drilling
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Serrated Point | |||||||||
| 7/8" | 0.875" | 6" | 4" | 1/2" | ANSI B212.15 | 2899A613 | 000000 | ||
Reduced-Shank Cobalt Steel Drill Bits
Carbide-Tipped Drill Bits
Extended Length Round Shank | Standard |
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Each | |||
Extended Length | ||||||||||
Uncoated | ||||||||||
| 7/8" | 0.875" | 10" | 4.81" | Round | 7/8" | Standard | 29465A57 | 000000 | ||
Reduced-Shank Carbide-Tipped Drill Bits
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Each | |||
Jobbers' Length | ||||||||||
Uncoated | ||||||||||
| 7/8" | 0.875" | 6" | 2.1" | Reduced Round | 1/2" | Standard | 8871A24 | 0000000 | ||
Cobalt Steel Drill Bits
Chip-Clearing Drill Bits for Wood
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Drill Bit Point Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Black Oxide | |||||||||
Quick-Change Hex Shank | |||||||||
| 7/8" | 0.875" | 17" | 12" | 7/16" | Screw | 2818A16 | 000000 | ||
Uncoated | |||||||||
Round Shank/Tapered-Square Shank | |||||||||
| 7/8" | 0.875" | 18" | 12" | 5/16" | Screw | 2878A19 | 00000 | ||
Round Shank/Hex Shank | |||||||||
| 7/8" | 0.875" | 29" | 24" | 7/16" | Screw | 2907A36 | 00000 | ||
Quick-Change Hex Shank | |||||||||
| 7/8" | 0.875" | 8" | 5" | 7/16" | Screw | 2906A43 | 00000 | ||
Rebar-Cutting Carbide-Tipped Drill Bits
SDS-Plus Shank for Rotary Only Drilling
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SDS-Plus Shank |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||
Standard Point | ||||||||
| 7/8" | 0.875" | 12" | 10" | ANSI B212.15 | 28655A65 | 000000 | ||
Round Shank for Rotary Only Drilling
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Standard Point | |||||||||
| 7/8" | 0.875" | 12" | 10" | 1/2" | ANSI B212.15 | 28655A27 | 000000 | ||
Drill Bits for Wood
High-Speed Steel Precise-Cut Drill Bits for Wood
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Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Drill Bit Point Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Round Shank | |||||||||
| 7/8" | 0.875" | 6" | 3" | 1/2" | Brad | 2926A88 | 000000 | ||
Fast-Cutting Smooth-Finish Drill Bits for Wood
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Round Shank Standard Point |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Drill Bit Point Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Round Shank | |||||||||
| 7/8" | 0.875" | 6" | 4" | 1/2" | Standard | 2890A17 | 000000 | ||
Tapping Screw Installation Drill Bits for Masonry and Concrete
Carbide-Tipped Smooth-Finish Drill Bits for Wood
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Carbide-Tipped Steel |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Drill Bit Point Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Carbide Tipped/Uncoated | |||||||||
Round Shank | |||||||||
| 7/8" | 0.875" | 3 1/2" | 3" | 3/8" | Standard | 8799A36 | 000000 | ||
Depth-Limiting Drill Stop Sets
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No. of Pieces | For Drill Bit Size | Hex Key Size for Set Screw | Material | Each | ||
|---|---|---|---|---|---|---|
| 4 | 5/8", 3/4", 7/8", 1" | 5/32" | Steel | 8959A19 | 000000 |
Smooth-Finish Drill Bits for Wood
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Round Shank |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Drill Bit Point Type | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Round Shank | |||||||||
| 7/8" | 0.875" | 3 1/2" | 3" | 13/32" | Standard | 3216A25 | 000000 | ||
Carbide-Insert Drill Bits
Drill Bits | Replacement Insert Screws | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shank | For Insert | |||||||||||||
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Inner Inscribed Circle Dia. | Outer Inscribed Circle Dia. | Each | Each | ||||
| 7/8" | 0.875" | 5 5/8" | 2.63" | Round | 1" | Carbide Insert | 0.268" | 0.295" | 2769N22 | 0000000 | 2780N13 | 00000 | ||
| 7/8" | 0.875" | 7 3/8" | 4.38" | Round | 1" | Carbide Insert | 0.268" | 0.295" | 2769N23 | 000000 | 2780N13 | 0000 | ||
Dust-Collecting Carbide-Tipped Drill Bits for Masonry and Concrete
SDS-Max Shank for Hammer and Rotary Drilling
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SDS-Max Shank |
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | For Vacuum Hose ID | Each | |||
|---|---|---|---|---|---|---|---|---|
Titanium Nitride (TiN) Coated | ||||||||
Standard Point | ||||||||
| 7/8" | 0.875" | 25" | 15" | 1 3/8" | 2656N2 | 0000000 | ||
Drill Bits for Glass and Ceramic
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Bit ID | Diamond Tip Lg. | Diamond Tip Grit | Thread Size | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Core Bit | |||||||||||
Diamond Coated | |||||||||||
| 7/8" | 0.875" | 3 1/2" | 2" | 0.817" | 1/4" | 100 | 5/8"-18 | 2868A38 | 0000000 | ||
Chip-Clearing Carbide-Tipped Drill Bits for Masonry and Concrete
Round Shank for Rotary Only Drilling
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Shank Size | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||
Standard Point | |||||||||
| 7/8" | 0.875" | 6" | 4.5" | 1/2" | ANSI B212.15 | 2941A42 | 000000 | ||
Inserts for Carbide-Insert Drill Bits
Inner
![]() | ![]() | ![]() |
Individual Carbide Insert Case | Inner Inserts |
Each | Package | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Drill Bit Size | For Mfr. | For Mfr. Series | IC Dia. | Thk. | Hole Dia. | Tip Radius | For Use On | Features | Each | Pkg. Qty. | Pkg. | ||||
Titanium Aluminum Nitride (TiAlN)-Coated Carbide | |||||||||||||||
| 7/8" | Sandvik Coromant | CoroDrill 880 | 0.268" | 1/8" | 1/8" | 1/64" | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Aluminum, Brass, Bronze, Fiberglass, Plastic | Chip Breakers | 2776N17 | 000000 | 10 | 2776N341 | 0000000 | ||
Outer
![]() | ![]() | ![]() |
Individual Carbide Insert Case | Outer Inserts |
Each | Package | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Drill Bit Size | For Mfr. | For Mfr. Series | IC Dia. | Thk. | Hole Dia. | Tip Radius | For Use On | Features | Each | Pkg. Qty. | Pkg. | ||||
Titanium Nitride (TiN)-Coated Carbide | |||||||||||||||
| 7/8" | Sandvik Coromant | CoroDrill 880 | 0.295" | 1/8" | 1/8" | 1/32" | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Aluminum, Brass, Bronze, Plastic | Chip Breakers | 2776N18 | 000000 | 10 | 2776N349 | 0000000 | ||
Carbide-Tipped Drill Bits for Glass and Ceramic
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Each | |||
Spear Bit | ||||||||||
Carbide Tipped/Uncoated | ||||||||||
| 7/8" | 0.875" | 4" | 0.25" | Round | 5/16" | Standard | 2954A73 | 000000 | ||
Depth-Limiting Drill Stops
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For Drill Bit Size | For Drill Bit Size Decimal Equiv. | Overall Lg. | OD | Hex Key Size for Set Screw | Material | Each | |||
|---|---|---|---|---|---|---|---|---|---|
For Inch Drill Bits | |||||||||
| 7/8" | 0.8750" | 1 3/8" | 1 3/8" | 5/32" | Steel | 8865A255 | 000000 | ||
Tight-Tolerance Water-Hardening W1 Tool Steel Rods
Dia. | Dia. Tolerance | Drill Bit Size | Fabrication | Heat Treatment | Yield Strength, psi | Mechanical Finish | Hardness | Max. Hardness After Heat Treatment | Specs. Met | 1 ft. Long | 3 ft. Long | 6 ft. Long | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.875" | -0.001" to 0.001" | 7/8" | Hot Rolled | Annealed | 50,000 | Precision Ground | Rockwell B95 (Medium) | Rockwell C65 | ASTM A686 | 8890K29 | 000000 | 000000 | 000000 |








































