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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
High-Speed Steel Drill Bits
Shank | Each | Package | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | Pkg. Qty. | Pkg. | ||||
Jobbers' Length | ||||||||||||||
Black Oxide | ||||||||||||||
| 4.0 | 0.1575" | 75 | 35 | Round | 4 mm | Standard | Dormer Pramet | 2958A72 | 00000 | 10 | 2958A722 | 000000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||||
| 4.0 | 0.1575" | 75 | 37 | Round | 4 mm | Standard | Chicago-Latrobe | 8950A15 | 0000 | — | ——— | 0 | ||
Uncoated | ||||||||||||||
| 4.0 | 0.1575" | 83 | 42.9 | Round | 4 mm | Standard | Viking Norseman Drill | 2951A132 | 0000 | — | ——— | 0 | ||
Black/Gold Oxide | ||||||||||||||
| 4.0 | 0.1575" | 83 | 49.2 | Round | 4 mm | Split | Viking Norseman Drill | 30565A261 | 0000 | 10 | 30565A429 | 00000 | ||
Short Length | ||||||||||||||
Black Oxide | ||||||||||||||
| 4.0 | 0.1575" | 55 | 13.9 | Round | 4 mm | Split | Dormer Pramet | 28255A33 | 0000 | — | ——— | 0 | ||
Titanium Nitride (TiN) Coated | ||||||||||||||
| 4.0 | 0.1575" | 56 | 22.1 | Round | 4 mm | Split | Dormer Pramet | 2979N19 | 0000 | — | ——— | 0 | ||
Extended Length | ||||||||||||||
Black Oxide | ||||||||||||||
| 4.0 | 0.1575" | 160 | 91.9 | Round | 4 mm | Standard | Dormer Pramet | 88455A42 | 00000 | — | ——— | 0 | ||
| 4.0 | 0.1575" | 200 | 141.9 | Round | 4 mm | Standard | Dormer Pramet | 88455A62 | 00000 | — | ——— | 0 | ||
| 4.0 | 0.1575" | 315 | 241.9 | Round | 4 mm | Standard | Dormer Pramet | 88455A72 | 00000 | — | ——— | 0 | ||
Uncoated | ||||||||||||||
| 4.0 | 0.1575" | 119 | 69.7 | Round | 4 mm | Standard | Dormer Pramet | 3083A144 | 0000 | — | ——— | 0 | ||
Cobalt Steel Drill Bits
Jobbers' Length Round Shank | Short Length Round Shank | Split |
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 4.0 | 0.1575" | 75 | 42.9 | Round | 4 mm | Split | Dormer Pramet | 5058N61 | 00000 | ||
Titanium Aluminum Nitride (TiAlN) Coated | |||||||||||
| 4.0 | 0.1575" | 75 | 37 | Round | 4 mm | Split | Guhring | 2753A167 | 00000 | ||
Gold Oxide | |||||||||||
| 4.0 | 0.1575" | 75 | 35 | Round | 4 mm | Split | Dormer Pramet | 29355A64 | 0000 | ||
Short Length | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 4.0 | 0.1575" | 56 | 14 | Round | 4 mm | Split | Chicago-Latrobe | 2456N148 | 0000 | ||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 56 | 14 | Round | 4 mm | Split | Chicago-Latrobe | 2456N121 | 0000 | ||
Carbide Drill Bits
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Round Shank | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 4.0 | 0.1575" | 63 | 35 | Round | 4 mm | Four Facet | Ultra Tool | 3030A78 | 000000 | ||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 63 | 28 | Round | 4 mm | Four Facet | Ultra Tool | 3030A27 | 00000 | ||
Short Length | |||||||||||
Round Shank | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 4.0 | 0.1575" | 63 | 19 | Round | 4 mm | Four Facet | Ultra Tool | 27515A713 | 00000 | ||
Titanium Aluminum Nitride (TiAlN) Coated | |||||||||||
| 4.0 | 0.1575" | 63 | 19 | Round | 4 mm | Four Facet | Ultra Tool | 8879A613 | 00000 | ||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 63 | 19 | Round | 4 mm | Four Facet | Ultra Tool | 2956A813 | 00000 | ||
Left-Hand Cobalt Steel Drill Bits
Shank | Each | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | 1-9 | 10-Up | |||
Jobbers' Length | ||||||||||||
Uncoated | ||||||||||||
| 4.0 | 0.1575" | 83 | 54 | Round | 4 mm | Split | Viking Norseman Drill | 3474A54 | 000000 | 000000 | ||
High-Speed Steel Drill Bits for Plastic
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Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size, mm | Point Angle | Drill Bit Point Type | Mfr. | Each | |||
Uncoated | ||||||||||||
| 4.0 | 0.1575" | 75 | 43 | Round | 4 | 60° | Standard | ICS | 27465A413 | 00000 | ||
Carbide-Tipped Drill Bits
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 79 | 41.9 | Round | 4 mm | Standard | Izar | 28595A51 | 000000 | ||
| 4.0 | 0.1575" | 79 | 54 | Round | 4 mm | Split | ICS | 28595A22 | 00000 | ||
Short Length | |||||||||||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 52 | 12 | Round | 4 mm | Standard | Izar | 28805A403 | 00000 | ||
Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite
Hole-Starting Cobalt Steel Drill Bits
Strong-Hold Bit Adapters
Hex Shank Size | For Bit Shank Type | For Bit HIOS Shank Size, mm | For Bit Half Moon Shank Size, mm | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Quick-Change Chuck | |||||||||
| 1/4" | HIOS, Half Moon | 4 | 4 | 2" | Steel | 7225A78 | 000000 | ||
Carbide Drill Bits for Hardened Steel
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Short Length | |||||||||||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 63 | 15.2 | Round | 4 mm | Split | Ultra Tool | 8842A47 | 000000 | ||
Left-Hand High-Speed Steel Drill Bits
Shank | Each | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | 1-9 | 10-Up | |||
Jobbers' Length | ||||||||||||
Black Oxide | ||||||||||||
| 4.0 | 0.1575" | 75 | 35 | Round | 4 mm | Standard | Dormer Pramet | 29855A56 | 00000 | 00000 | ||
Chip-Clearing Cobalt Steel Drill Bits
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Flute Type | Type | Size, mm | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Uncoated | ||||||||||||
| 4.0 | 0.1575" | 76 | 41 | Parabolic | Round | 4 | Split | Viking Norseman Drill | 2771N49 | 00000 | ||
Smooth-Finish Carbide Drill Bits
Jobbers' Length Round Shank | Split |
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Uncoated | |||||||||||
| 4.0 | 0.1575" | 55 | 21.9 | Round | 4 mm | Split | Kyocera | 2783A2 | 000000 | ||
Hex Bits
Hex Shank |
Drive Size | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|
For Hand Tools | ||||||
4 mm Hex Shank Size | ||||||
| 0.028" | 1" | Steel | 8526A21 | 00000 | ||
| 0.035" | 1" | Steel | 8526A22 | 0000 | ||
| 0.050" | 1" | Steel | 8526A23 | 0000 | ||
| 1/16" | 1 1/8" | Steel | 8526A11 | 0000 | ||
| 5/64" | 1 1/8" | Steel | 8526A12 | 0000 | ||
| 3/32" | 1 1/8" | Steel | 8526A13 | 0000 | ||
| 7/64" | 1 1/8" | Steel | 8526A14 | 0000 | ||
| 1/8" | 1 1/8" | Steel | 8526A15 | 0000 | ||
| 9/64" | 1 1/8" | Steel | 8526A16 | 0000 | ||
| 5/32" | 1 1/8" | Steel | 8526A17 | 0000 | ||
| 0.71 mm | 1 1/8" | Steel | 7389A11 | 0000 | ||
| 0.89 mm | 1 1/8" | Steel | 7389A12 | 0000 | ||
| 1.27 mm | 1 1/8" | Steel | 7389A13 | 0000 | ||
| 1.5 mm | 1 1/8" | Steel | 7389A14 | 0000 | ||
| 2 mm | 1 1/8" | Steel | 7389A15 | 0000 | ||
| 2.5 mm | 1 1/8" | Steel | 7389A16 | 0000 | ||
| 3 mm | 1 1/8" | Steel | 7389A17 | 0000 | ||
| 4 mm | 1 1/8" | Steel | 7389A18 | 0000 | ||
Carbide Drill Bits for Sheet Metal
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Type | Size | Drill Bit Point Type | No. of Drilling Ends | Mfr. | Each | |||
Short Length | ||||||||||||
Uncoated | ||||||||||||
| 4.0 | 0.1575" | 50 | 8 | Round | 4 mm | Standard | 1 | Ultra Tool | 8769A42 | 000000 | ||
Chip-Clearing High-Speed Steel Drill Bits
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Flute Type | Type | Size, mm | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Black Oxide | ||||||||||||
| 4.0 | 0.1575" | 75 | 35 | High Helix | Round | 4 | Split | Dormer Pramet | 30055A59 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||
| 4.0 | 0.1575" | 75 | 43 | Parabolic | Round | 4 | Split | Dormer Pramet | 7333N22 | 0000 | ||
Uncoated | ||||||||||||
| 4.0 | 0.1575" | 75 | 35 | Parabolic | Round | 4 | Split | Dormer Pramet | 2754A26 | 0000 | ||
Phillips Bits
Hex Shank |
Slotted Bits
![]() |
Hex Shank |
Drive Size | For Screw Size | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|---|
For Hand Tools | |||||||
4 mm Hex Shank Size | |||||||
| 0.032" | No. 000 | 1 1/8" | Steel | 5750A371 | 00000 | ||
| 0.048" | No. 00 | 1 1/8" | Steel | 5750A372 | 0000 | ||
| 0.060" | No. 0 | 1 1/8" | Steel | 5750A373 | 0000 | ||
| 0.071" | No. 1 | 1 1/8" | Steel | 5750A374 | 0000 | ||
| 0.079" | No. 2 | 1 1/8" | Steel | 5750A375 | 0000 | ||
| 0.099" | No. 3 | 1 1/8" | Steel | 5750A376 | 0000 | ||
| 0.119" | No. 4 | 1 1/8" | Steel | 5750A377 | 0000 | ||
| 0.138" | No. 5 | 1 1/8" | Steel | 5750A378 | 0000 | ||
| 0.158" | No. 6 | 1 1/8" | Steel | 5750A379 | 0000 | ||
Chip-Clearing Cobalt Steel Drill Bits for Nickel and Stainless Steel
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Flute Type | Type | Size, mm | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Titanium Aluminum Nitride (TiAlN) Coated | ||||||||||||
| 4.0 | 0.1575" | 75 | 43 | Parabolic | Round | 4 | Split | Guhring | 3020A43 | 000000 | ||
Bit Adapters
Ball-Detent Bit Holder |
Hex Shank Size | For Bit Shank Type | For Bit Hex Shank Size, mm | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|---|---|
Ball-Detent Bit Holder | ||||||||
| 1/4" | Hex | 4 | 2 3/8" | Steel | 7225A75 | 00000 | ||
Bit Adapters for Bit Screwdrivers
Hex Shank Size | For Bit Shank Type | For Bit Hex Shank Size, mm | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|---|---|
Magnet Bit Holder | ||||||||
| 1/4" | Hex | 4 | 1" | Steel | 2587N12 | 00000 | ||
Microstix Bits
Pentalobe Bits
Screwdriver Bits | 1/4" Hex Shank Size Bit Adapters | |||||||
|---|---|---|---|---|---|---|---|---|
Drive Size | Overall Lg. | Material | Each | Each | ||||
For Hand Tools | ||||||||
4 mm Hex Shank Size | ||||||||
| PL1 | 1 1/8" | Steel | 1533N1 | 00000 | 7225A75 | 00000 | ||
| PL2 | 1 1/8" | Steel | 1533N2 | 0000 | 7225A75 | 0000 | ||
| PL3 | 1 1/8" | Steel | 1533N3 | 0000 | 7225A75 | 0000 | ||
| PL4 | 1 1/8" | Steel | 1533N4 | 0000 | 7225A75 | 0000 | ||
| PL5 | 1 1/8" | Steel | 1533N5 | 0000 | 7225A75 | 0000 | ||
| PL6 | 1 1/8" | Steel | 1533N6 | 0000 | 7225A75 | 0000 | ||
Torx Bits
![]() |
Hex Shank |
Drive Size | Overall Lg. | Material | Each | |||
|---|---|---|---|---|---|---|
For Hand Tools | ||||||
4 mm Hex Shank Size | ||||||
| T3 | 1 1/8" | Steel | 7013A61 | 00000 | ||
| T4 | 1 1/8" | Steel | 7013A62 | 0000 | ||
| T5 | 1 1/8" | Steel | 7013A63 | 0000 | ||
| T6 | 1 1/8" | Steel | 7013A64 | 0000 | ||
| T7 | 1 1/8" | Steel | 7013A65 | 0000 | ||
| T8 | 1 1/8" | Steel | 7013A66 | 0000 | ||
| T9 | 1 1/8" | Steel | 7013A67 | 0000 | ||
| T10 | 1 1/8" | Steel | 7013A68 | 0000 | ||
| T15 | 1 1/8" | Steel | 7013A69 | 0000 | ||
| T20 | 1 1/8" | Steel | 7013A71 | 0000 | ||




























