System of Measurement System of Measurement |
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For Use On For Use On |
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Shank Type Shank Type |
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![]() | Round |
Point Style Point Style |
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Split |
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Standard |
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Four Facet |
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Brad |
Length Class Length Class |
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![]() | Jobbers' Length |
Material Material |
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Maximum Drilling Depth Maximum Drilling Depth | Show |
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Maximum Drilling Depth Maximum Drilling Depth | Hide |
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Flute Direction Flute Direction |
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Right Hand |
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Left Hand |
Bit Style Bit Style |
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![]() | Spiral Flute |
![]() | Parabolic Spiral Flute |
Individual/Set Individual/Set |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Drill Bits


These jobbers'-length bits have the rigidity and length required for most applications.
Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.
For technical drawings and 3-D models, click on a part number.
Chip-Clearing Drill Bits


These jobbers'-length bits have the rigidity and length required for most applications. The flutes are designed to lift chips out of the hole, reducing clogging and improving coolant flow.
Parabolic spiral flute drill bits have wider flutes for more efficient chip evacuation than spiral-flute bits.
Black-oxide drill bits produce less friction than uncoated drill bits.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric—Parabolic Spiral Flute | ||||||||||
Uncoated High-Speed Steel | ||||||||||
4.0 mm | 0.1575" | 75mm | 35mm | Round | 4mm | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 338 | 0000000 | 00000 |
Metric—Spiral Flute | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
4.0 mm | 0.1575" | 75mm | 35mm | Round | 4mm | Split | Steel, Iron, Stainless Steel | DIN 338 | 00000000 | 0000 |
Cobalt Steel Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.
Gold-oxide drill bits produce less friction than uncoated drill bits.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | Each | |||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Gold-Oxide Cobalt Steel | ||||||||||
4.0 mm | 0.1575" | 75mm | 35mm | Round | 4mm | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
Carbide Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications. Made of solid carbide for the highest accuracy and longest tool life, they are harder, stronger, and more wear resistant than high-speed steel, cobalt steel, and carbide-tipped bits. They retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive material. The four-facet point keeps the bit centered without a pilot hole. These bits require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Metric | |||||||||
Titanium-Nitride (TiN) Coated Carbide | |||||||||
3.5 mm | 0.1378" | 63mm | 35mm | Round | 3.5mm | Four Facet | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 000000 |
4.0 mm | 0.1575" | 63mm | 35mm | Round | 4mm | Four Facet | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 |
Drill Bits for Carbon Fiber, Fiberglass, and Graphite


These jobbers'-length bits have the rigidity and length required for most applications. They are designed to make clean holes in abrasive material. Their point keeps the bit centered without a pilot hole.
Uncoated drill bits have three drill points that make clean holes in fiber-reinforced composites without fraying or delaminating the material.
Diamond-coated drill bits are highly wear resistant for drilling in abrasive material. They last longer than uncoated bits.
Shank | ||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Metric | ||||||||
Uncoated Carbide | ||||||||
3.5 mm | 0.1378" | 63mm | 35mm | Round | 3.5mm | Brad | 00000000 | 000000 |
4.0 mm | 0.1575" | 63mm | 35mm | Round | 4mm | Brad | 00000000 | 00000 |
Diamond-Coated Carbide | ||||||||
3.5 mm | 0.1378" | 63mm | 35mm | Round | 3.5mm | Brad | 0000000 | 00000 |
4.0 mm | 0.1575" | 63mm | 35mm | Round | 4mm | Brad | 0000000 | 00000 |
High-Speed Steel Left-Hand Drill Bits

Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are jobbers' length and have the rigidity and length required for most applications.
Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
4.0 mm | 0.1575" | 75mm | 35mm | Round | 4mm | Standard | Steel, Iron, Stainless Steel | DIN 338 | 00000000 | 00000 |
Cobalt Steel Left-Hand Drill Bits

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. Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are maintenance length, also known as mechanics’ length. They are shorter and more rigid than jobbers’ bits but longer than short-length bits. The split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Uncoated Cobalt Steel | ||||||||||
2.5 mm | 0.0984" | 60mm | 35mm | Round | 2.5mm | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | NAS907 Type J | 0000000 | 00000 |