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 15
- Drill America #27 HSS Black Oxide Jobber Length Drill Bit, D/AN Series SKU 8874 $1.24
- Drill America #27 HSS Black Oxide Jobber Length Drill Bit, DWDN Series SKU 8875 $0.72
- Approved Vendor #27 HSS Cobalt 118° Standard Point Jobber Length Drill Bit SKU 8876 $6.54
- Approved Vendor #27 HSS Left Hand Jobber Length Drill Bit SKU 8877 $3.45
- Approved Vendor #27 HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 8878 $4.60
- Approved Vendor #27 HSS Polished Jobber Length Drill Bit, D/AP Series SKU 8879 $1.24
- Approved Vendor #27 HSS Split Point Jobber Length Drill Bit, D/ASP Series SKU 8880 $1.42
- Approved Vendor #27 HSS Split Point Jobber Length Drill Bit, DWDSP Series SKU 8881 $1.09
- Approved Vendor #27 HSS Split Point Stub Drill Bit, D/AST Series SKU 8882 $1.24
- Approved Vendor #27 HSS Split Point Stub Drill Bit, DWDST Series SKU 8883 $1.04
- Approved Vendor #27 HSS Taper Length Drill Bit SKU 8885 $8.76
- Approved Vendor #27 Solid Carbide Drill Bit SKU 8886 $22.29
- Approved Vendor #27 Tin Coated Jobber Length Drill Bit SKU 8887 $4.76
- Drill America #27 x 12" HSS Aircraft Extension Drill Bit, DWDA/C SKU 8889 $7.46
- Approved Vendor #28 Carbide Tipped Jobber Length Drill Bit SKU 8892 $34.23
- Approved Vendor #28 Cobalt Jobber Length Drill Bit, D/ACO Series SKU 8893 $2.39
- Drill America #28 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 8894 $1.76
- Approved Vendor #28 Cobalt Long Threaded Shank Drill Bit SKU 8895 $5.75
- Approved Vendor #28 Cobalt Short Threaded Shank Drill Bit SKU 8896 $5.65
- Approved Vendor #28 Cobalt Split Point Stub Drill Bit SKU 8897 $2.24
- Approved Vendor #28 Cobalt Stubby Threaded Shank Drill Bit SKU 8898 $6.26
- Approved Vendor #28 HSS Black & Gold 135° Split Point Jobber Length Drill Bit SKU 8899 $4.15
- Drill America #28 HSS Black & Gold KFD Split Point Jobber Length Drill Bit Killer Force Drill Bit SKU 8900 $1.09
- Approved Vendor #28 HSS Black Oxide 118° Standard Point Jobber Length Drill Bit SKU 8901 $2.83
- Approved Vendor #28 HSS Black Oxide 135° Split Point Jobber Length Drill Bit SKU 8902 $3.87
- Drill America #28 HSS Black Oxide Jobber Length Drill Bit, D/AN Series SKU 8903 $1.16
- Drill America #28 HSS Black Oxide Jobber Length Drill Bit, DWDN Series SKU 8904 $0.65
- Approved Vendor #28 HSS Cobalt 118° Standard Point Jobber Length Drill Bit SKU 8905 $6.19
- Approved Vendor #28 HSS Left Hand Jobber Length Drill Bit SKU 8906 $3.08
- Approved Vendor #28 HSS Polished 118° Standard Point Jobber Length Drill Bit SKU 8907 $4.37
- Approved Vendor #28 HSS Polished Jobber Length Drill Bit, D/AP Series SKU 8908 $1.16
- Approved Vendor #28 HSS Split Point Jobber Length Drill Bit, D/ASP Series SKU 8909 $1.36
- Approved Vendor #28 HSS Split Point Jobber Length Drill Bit, DWDSP Series SKU 8910 $0.99
- Approved Vendor #28 HSS Split Point Stub Drill Bit, D/AST Series SKU 8911 $1.14
- Approved Vendor #28 HSS Split Point Stub Drill Bit, DWDST Series SKU 8912 $0.93
- Approved Vendor #28 HSS Taper Length Drill Bit SKU 8914 $8.76
- Approved Vendor #28 Solid Carbide Drill Bit SKU 8915 $22.19
- Approved Vendor #28 Tin Coated Jobber Length Drill Bit SKU 8916 $4.63
- Drill America #28 x 12" HSS Aircraft Extension Drill Bit, DWDA/C SKU 8919 $7.46
- Drill America #28 x 6" HSS Aircraft Extension Drill Bit, DWDA/C SKU 8921 $2.77
- Approved Vendor #29 Carbide Tipped Jobber Length Drill Bit SKU 8922 $33.60
- Approved Vendor #29 Cobalt Jobber Length Drill Bit, D/ACO Series SKU 8923 $2.33
- Drill America #29 Cobalt Jobber Length Drill Bit, DWDCO Series SKU 8924 $1.70
- Approved Vendor #29 Cobalt Long Threaded Shank Drill Bit SKU 8925 $4.85
- Approved Vendor #29 Cobalt Short Threaded Shank Drill Bit SKU 8926 $5.66
- Approved Vendor #29 Cobalt Split Point Stub Drill Bit SKU 8927 $2.24
- Approved Vendor #29 Cobalt Stubby Threaded Shank Drill Bit SKU 8928 $6.26
- Approved Vendor #29 HSS Black & Gold 135° Split Point Jobber Length Drill Bit SKU 8929 $4.15