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High quality American-made number drill bits made by Triumph Twist Drill Co. These twist bits are made of High Speed Steel to hold their sharp cutting edges longer, & have a bright finish. These twist bits are for general purpose drilling in a variety of materials. They will work well in hard & softwoods, aluminum, aluminum alloys, brass, bronze - soft & medium, & plastics. Made in the USA.
Triumph Twist Drill has manufactured High-Quality cutting tools for over 50 years. Starting in 1952, founder Harry Beck set out to provide customers with a product that the drill industry had been lacking. Harry, along with his son Jim and Cy Brock, decided to enter the small drill business and create quality, handmade products with the customer in mind.
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Drill Bit Size Decimal Equivalent Flute Length Overall Length Model 1 .2280 2 - 5/8" 3 - 7/8" 012001 2 .2210 2 - 5/8" 3 - 7/8" 012002 3 .2130 2 - 1/2" 3 - 3/4" 012003 4 .2090 2 - 1/2" 3 - 3/4" 012004 5 .2055 2 - 1/2" 3 - 3/4" 012005 6 .2040 2 - 1/2" 3 - 3/4" 012006 7 .2010 2 - 7/16" 3 - 5/8" 012007 8 .1990 2 - 7/16" 3 - 5/8" 012008 9 .1960 2 - 7/16" 3 - 5/8" 012009 10 .1935 2 - 7/16" 3 - 5/8" 012010 11 .1910 2 - 5/16" 3 - 1/2" 012011 12 .1890 2 - 5/16" 3 - 1/2" 012012 13 .1850 2 - 5/16" 3 - 1/2" 012013 14 .1820 2 - 3/16" 3 - 3/8" 012014 15 .1800 2 - 3/16" 3 - 3/8" 012015 16 .1770 2 - 3/16" 3 - 3/8" 012016 17 .1730 2 - 3/16" 3 - 3/8" 012017 18 .1695 2 - 1/8" 3 - 1/4" 012018 19 .1660 2 - 1/8" 3 - 1/4" 012019 20 .1610 2 - 1/8" 3 - 1/4" 012020 21 .1590 2 - 1/8" 3 - 1/4" 012021 22 .1570 2" 3 - 1/8" 012022 23 .1540 2" 3 - 1/8" 012023 24 .1520 2" 3 - 1/8" 012024 25 .1495 1 - 7/8" 3" 012025 26 .1470 1 - 7/8" 3" 012026 27 .1440 1 - 7/8" 3" 012027 28 .1405 1 - 3/4" 2 - 7/8" 012028 29 .1405 1 - 3/4" 2 - 7/8" 012029 30 .1285 1 - 5/8" 2 - 3/4" 012030 31 .1200 1 - 5/8" 2 - 3/4" 012031 32 .1160 1 - 5/8" 2 - 3/4" 012032 33 .1130 1 - 1/2" 2 - 5/8" 012033 34 .1110 1 - 1/2" 2 - 5/8" 012034 35 .1100 1 - 1/2" 2 - 5/8" 012035 36 .1065 1 - 7/16" 2 - 1/2" 012036 37 .1040 1 - 7/16" 2 - 1/2" 012037 38 .1015 1 - 7/16" 2 - 1/2" 012038 39 .0995 1 - 3/8" 2 - 3/8" 012039 40 .0980 1 - 3/8" 2 - 3/8" 012040 41 .0960 1 - 3/8" 2 - 3/8" 012041 42 .0935 1 - 1/4" 2 - 1/4" 012042 43 .0890 1 - 1/4" 2 - 1/4" 012043 44 .0860 1 - 1/8" 2 - 1/8" 012044 45 .0820 1 - 1/8" 2 - 1/8" 012045 46 .0810 1 - 1/8" 2 - 1/8" 012046 47 .0785 1" 2" 012047 48 .0760 1" 2" 012048 49 .0730 1" 2" 012049 50 .0700 1" 2" 012050 51 .0670 1" 2" 012051 52 .0635 7/8" 1 - 7/8" 012052 53 .0595 7/8" 1 - 7/8" 012053 54 .0550 7/8" 1 - 7/8" 012054 55 .0520 7/8" 1 - 7/8" 012055 56 .0465 3/4" 1 - 3/4" 012056 57 .0430 3/4" 1 - 3/4" 012057 58 .0420 11/16" 1 - 5/8" 012058 59 .0410 11/16" 1 - 5/8" 012059 60 .0400 11/16" 1 - 5/8" 012060 61 .0390 11/16" 1 - 5/8" 012061 62 .0380 5/8" 1 - 1/2" 012062 63 .0370 5/8" 1 - 1/2" 012063 64 .0360 5/8" 1 - 1/2" 012064 65 .0350 5/8" 1 - 1/2" 012065 66 .0330 1/2" 1 - 3/8" 012066 67 .0320 1/2" 1 - 3/8" 012067 68 .0310 1/2" 1 - 3/8" 012068 69 .0292 1/2" 1 - 3/8" 012069 70 .0280 3/8" 1 - 1/4" 012070 71 .0260 3/8" 1 - 1/4" 012071 72 .0250 5/16" 1 - 1/8" 012072 73 .0240 5/16" 1 - 1/8" 012073 74 .0225 1/4" 1" 012074 75 .0210 1/4" 1" 012075 76 .0200 3/16" 7/8" 012076 77 .0180 3/16" 7/8" 012077 78 .0160 3/16" 7/8" 012078 79 .0145 1/8" 3/4" 012079 80 .0135 1/8" 3/4" 012080