Drill Bits

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This section covers twist drill bits for metal, wood and plastic, along with step drills, masonry bits and drill bit sets. Lengths include stub (screw machine), jobber, taper and extra-long. Materials range from general-purpose high-speed steel (HSS) to cobalt for stainless and tough alloys and solid carbide for production machining. Sizes come in fractional, letter, number (wire gauge) and metric series, with black oxide, bright, gold oxide and titanium nitride finishes.

What to check before you order

• Workpiece material. HSS suits mild steel, aluminum and wood. Cobalt holds up in stainless. Carbide-tipped masonry bits are for concrete and block in a hammer drill.
• Point style. A 135 degree split point self-centers and cuts harder metals. A 118 degree point is common for general work.
• Length. Stub length bits are stiffer and wander less. Use jobber length for general work and taper or extra-long only when you need reach.
• Shank. Check the chuck. Reduced shank bits fit a 1/2" chuck on larger sizes, and SDS shanks fit rotary hammers.
• Tap drill sizes. Number and letter sizes exist mainly to drill tap holes. Keep a chart near the drill press.

Common questions

What is a jobber length drill bit?

It is the standard general-purpose length, long enough for most hand drill and drill press work while still fairly rigid.

Learn more in our drill bit materials guide, browse Alfa Tool bits, or see taps and dies and all cutting tools.

Drill Bits: page 46

• Approved Vendor 1/64" HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 17455 $4.60
• Approved Vendor 1/64" HSS Polished Jobber Length Drill Bit, D/AP Series SKU 17456 $1.64
• Approved Vendor 1/64" HSS Polished Jobber Length Drill Bit, DWDP Series SKU 17457 $1.43
• Approved Vendor 1/64" HSS Taper Length Drill Bit SKU 17458 $7.81
• Alfa Tool 1/8 Cobalt Left Hand Jobber Drill SKU JDLCO93105 $14.20
• Approved Vendor 1/8" Brad Point Drill Bit SKU 17473 $1.54
• Approved Vendor 1/8" Carbide Spade Drill Bit SKU 17485 $19.31
• Approved Vendor 1/8" Carbide Tipped 4 Flute Glass & Tile Drill Bit SKU 17486 $7.56
• Approved Vendor 1/8" Carbide Tipped 4 Flute Glass & Tile Drill Bit with Hex Shank SKU 17487 $8.32
• Approved Vendor 1/8" Carbide Tipped Die Drill Bit SKU 17488 $24.73
• Approved Vendor 1/8" Carbide Tipped Glass & Tile Drill Bit SKU 17489 $7.56
• Approved Vendor 1/8" Carbide Tipped Glass & Tile Drill Bit with Hex Shank SKU 17490 $8.32
• Approved Vendor 1/8" Carbide Tipped Jobber Length Drill Bit SKU 17491 $28.23
• Approved Vendor 1/8" Carbide Tipped Taper Length Drill Bit SKU 17492 $47.87
• Approved Vendor 1/8" Cobalt Jobber Length Drill Bit, D/ACO Series SKU 17496 $2.21
• Drill America 1/8" Cobalt Jobber Length Drill Bit, DWDCO Series SKU 17497 $1.79
• Approved Vendor 1/8" Cobalt Long Threaded Shank Drill Bit SKU 17498 $4.76
• Approved Vendor 1/8" Cobalt Short Threaded Shank Drill Bit SKU 17500 $4.56
• Approved Vendor 1/8" Cobalt Split Point Stub Drill Bit SKU 17501 $2.24
• Approved Vendor 1/8" Cobalt Stubby Threaded Shank Drill Bit SKU 17502 $4.95
• Approved Vendor 1/8" Cobalt Taper Length Drill Bit SKU 17503 $15.92
• Approved Vendor 1/8" Cryogenic HSS Black & Gold Jobber Length Drill Bit SKU 17504 $4.05
• Irwin 1/8" Hex Shank Drill Bit SKU 585-4935636 $4.56
• Approved Vendor 1/8" HSS 1MT Taper Shank Drill Bit SKU 17538 $6.41
• Approved Vendor 1/8" HSS Black & Gold 135° Split Point Jobber Length Drill Bit SKU 17539 $3.03
• Drill America 1/8" HSS Black & Gold KFD Split Point Jobber Length Drill Bit Killer Force Drill Bit SKU 17540 $0.90
• Drill America 1/8" HSS Black & Gold KFD Split Point Mechanics Length Drill Bit SKU 17541 $1.20
• Approved Vendor 1/8" HSS Black & Gold Split Point Drill Bit, Contractor Series SKU 17542 $0.72
• Approved Vendor 1/8" HSS Black & Gold Split Point Stub Drill Bit, Contractor Series SKU 17543 $0.89
• Approved Vendor 1/8" HSS Black Oxide 118° Standard Point Jobber Length Drill Bit SKU 17544 $1.79
• Approved Vendor 1/8" HSS Black Oxide 135° Split Point Jobber Length Drill Bit SKU 17545 $3.23
• Drill America 1/8" HSS Black Oxide Jobber Length Drill Bit, D/AN Series SKU 17546 $1.03
• Drill America 1/8" HSS Black Oxide Jobber Length Drill Bit, DWDN Series SKU 17547 $0.49
• Approved Vendor 1/8" HSS Cobalt 135° Split Point Jobber Length Drill Bit SKU 17548 $5.70
• Approved Vendor 1/8" HSS Double End Drill Bit, D/ADE Series SKU 17549 $2.52
• Approved Vendor 1/8" HSS Double End Drill Bit, DWDDE Series SKU 17550 $1.47
• Approved Vendor 1/8" HSS Jobber Length Drill Bit Blank SKU 17551 $2.46
• Approved Vendor 1/8" HSS Left Hand Jobber Length Drill Bit SKU 17552 $3.45
• Approved Vendor 1/8" HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 17553 $2.98
• Approved Vendor 1/8" HSS Polished Jobber Length Drill Bit, D/AP Series SKU 17554 $1.03
• Approved Vendor 1/8" HSS Polished Jobber Length Drill Bit, DWDP Series SKU 17555 $0.88
• Approved Vendor 1/8" HSS Split Point Jobber Length Drill Bit, D/ASP Series SKU 17558 $1.18
• Approved Vendor 1/8" HSS Split Point Jobber Length Drill Bit, DWDSP Series SKU 17559 $0.97
• Approved Vendor 1/8" HSS Split Point Stub Drill Bit, D/AST Series SKU 17560 $1.05
• Approved Vendor 1/8" HSS Split Point Stub Drill Bit, DWDST Series SKU 17561 $0.78
• Approved Vendor 1/8" HSS Taper Length Drill Bit SKU 17566 $5.13
• Approved Vendor 1/8" Solid Carbide Drill Bit SKU 17580 $17.47
• Approved Vendor 1/8" Tin Coated Jobber Length Drill Bit SKU 17585 $2.61

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