Drill Bits
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Expected delivery: Wed, Nov 18
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 31
- Drill America #55 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 10061 $1.49
- Approved Vendor #55 Cobalt Split Point Stub Drill Bit SKU 10062 $2.12
- Approved Vendor #55 HSS Black & Gold 135° Split Point Jobber Length Drill Bit SKU 10063 $3.30
- Drill America #55 HSS Black & Gold KFD Split Point Jobber Length Drill Bit Killer Force Drill Bit SKU 10064 $0.93
- Approved Vendor #55 HSS Black Oxide 118° Standard Point Jobber Length Drill Bit SKU 10065 $2.74
- Drill America #55 HSS Black Oxide Jobber Length Drill Bit, D/AN Series SKU 10066 $1.10
- Drill America #55 HSS Black Oxide Jobber Length Drill Bit, DWDN Series SKU 10067 $0.74
- Approved Vendor #55 HSS Cobalt 135° Split Point Jobber Length Drill Bit SKU 10068 $5.01
- Approved Vendor #55 HSS Left Hand Jobber Length Drill Bit SKU 10069 $3.11
- Approved Vendor #55 HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 10070 $3.82
- Approved Vendor #55 HSS Polished Jobber Length Drill Bit, D/AP Series SKU 10071 $1.10
- Approved Vendor #55 HSS Split Point Stub Drill Bit, D/AST Series SKU 10072 $0.98
- Approved Vendor #55 HSS Split Point Stub Drill Bit, DWDST Series SKU 10073 $0.80
- Approved Vendor #55 HSS Taper Length Drill Bit SKU 10075 $3.74
- Approved Vendor #55 Solid Carbide Drill Bit SKU 10076 $13.17
- Drill America #55 x 12" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10077 $12.92
- Drill America #55 x 6" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10078 $6.60
- Approved Vendor #56 Cobalt Jobber Length Drill Bit, D/ACO Series SKU 10079 $2.27
- Drill America #56 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 10080 $1.69
- Approved Vendor #56 Cobalt Split Point Stub Drill Bit SKU 10081 $2.12
- Approved Vendor #56 HSS Black & Gold 135° Split Point Jobber Length Drill Bit SKU 10082 $3.30
- Drill America #56 HSS Black & Gold KFD Split Point Jobber Length Drill Bit Killer Force Drill Bit SKU 10083 $0.93
- Approved Vendor #56 HSS Black Oxide 118° Standard Point Jobber Length Drill Bit SKU 10084 $2.74
- Drill America #56 HSS Black Oxide Jobber Length Drill Bit, D/AN Series SKU 10085 $1.10
- Drill America #56 HSS Black Oxide Jobber Length Drill Bit, DWDN Series SKU 10086 $0.74
- Approved Vendor #56 HSS Cobalt 135° Split Point Jobber Length Drill Bit SKU 10087 $5.59
- Approved Vendor #56 HSS Left Hand Jobber Length Drill Bit SKU 10088 $3.11
- Approved Vendor #56 HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 10089 $3.82
- Approved Vendor #56 HSS Polished Jobber Length Drill Bit, D/AP Series SKU 10090 $1.10
- Approved Vendor #56 HSS Split Point Stub Drill Bit, D/AST Series SKU 10091 $0.98
- Approved Vendor #56 HSS Split Point Stub Drill Bit, DWDST Series SKU 10092 $0.80
- Approved Vendor #56 HSS Taper Length Drill Bit SKU 10094 $3.74
- Approved Vendor #56 Solid Carbide Drill Bit SKU 10095 $14.08
- Drill America #56 x 12" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10097 $12.92
- Drill America #56 x 6" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10098 $6.60
- Approved Vendor #57 Cobalt Jobber Length Drill Bit, D/ACO Series SKU 10099 $2.27
- Drill America #57 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 10100 $1.69
- Approved Vendor #57 Cobalt Split Point Stub Drill Bit SKU 10101 $2.12
- Approved Vendor #57 HSS Polished Jobber Length Drill Bit, D/AP Series SKU 10110 $1.21
- Approved Vendor #57 HSS Split Point Stub Drill Bit, D/AST Series SKU 10111 $1.14
- Approved Vendor #57 HSS Split Point Stub Drill Bit, DWDST Series SKU 10112 $0.93
- Approved Vendor #57 HSS Taper Length Drill Bit SKU 10114 $3.74
- Approved Vendor #57 Solid Carbide Drill Bit SKU 10115 $16.70
- Drill America #57 x 12" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10116 $12.92
- Drill America #57 x 6" HSS Aircraft Extension Drill Bit, DWDA/C SKU 10117 $7.96
- Approved Vendor #58 Cobalt Jobber Length Drill Bit, D/ACO Series SKU 10118 $2.27
- Drill America #58 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 10119 $1.69
- Approved Vendor #58 Cobalt Split Point Stub Drill Bit SKU 10120 $2.26