Letter Drill Bits | McMaster-Carr

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About Drill Bits

Compare material, finish, length class, and decimal size equivalents.

Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Short-Length Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.

Extended-Length Drill Bits

Cobalt Steel Drill Bits

Short-Length Cobalt Steel Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits.

Chip-Clearing Cobalt Steel Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow.

Carbide Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Smooth-Finish Carbide Drill Bits

Three cutting edges instead of the typical two enable these bits to drill holes with a smoother finish than other bits.

Short-Flute Extended-Length
Carbide-Tipped Drill Bits

The short flutes provide increased rigidity for drilling straighter holes than standard extended-length drill bits.

Carbide-Tipped Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications.

Carbide Drill Bits for Hardened Steel

Harder, stronger, and more wear resistant than carbide-tipped steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.

Drill Bits for Carbon Fiber, Fiberglass, and Graphite

These jobbers'-length bits have the rigidity and length required for most applications.

Drill Bits for Plastic

The sharp point allows for gradual penetration to reduce friction and eliminate cracking and chipping when drilling in plastic.

Carbide Drill Bits for Stainless Steel and Nickel

Harder, stronger, and more wear resistant than cobalt steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.

Drill Bit Sets

These jobbers'-length bits have the rigidity and length required for most applications.

Short-Length Drill Bit Sets

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.

Cobalt Steel Drill Bit Sets

Short-Length Cobalt Steel Drill Bit Sets

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits.

Left-Hand Drill Bit Sets

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.

Drill Bits

Drill Bits

Short-Length Drill Bits

Extended-Length Drill Bits

Cobalt Steel Drill Bits

Short-Length Cobalt Steel Drill Bits

Chip-Clearing Cobalt Steel Drill Bits

Carbide Drill Bits

Smooth-Finish Carbide Drill Bits

Short-Flute Extended-LengthCarbide-Tipped Drill Bits

Carbide-Tipped Drill Bits

Carbide Drill Bits for Hardened Steel

Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Drill Bits for Plastic

Carbide Drill Bits for Stainless Steel and Nickel

Drill Bit Sets

Drill Bit Sets

Short-Length Drill Bit Sets

Cobalt Steel Drill Bit Sets

Short-Length Cobalt Steel Drill Bit Sets

Left-Hand Drill Bit Sets

Short-Flute Extended-Length
Carbide-Tipped Drill Bits