HSS Twist Drill Bits

  • Industrial Quality High Speed Steel

  • Heavy Duty Black Oxide Finish and Precision grounded from solid

  • Vacuum heat-treated to improve uniform hardness to HRc 64-66

  • 135 Degree Split Point prevents and reduces wobbling 

Jobber Length - Straight Shank:

Number Drills - Black Oxide Jobbers:

  • 1/16" ... 19/64" contains 12 drills per envelope

  • 5/16" ... 1/2" contains 6 drills per envelope

  • 25/64" (75-2045) ... 1/2" (75-2052) have a 3/8" Reduced Shank and contain 6 drills per envelope

Aircraft Extension Drills - Extended Length, Straight Shank:

  • 76-3610 ... 76-3690 have a 6" OAL

  • 76-3010 ... 76-3090 have a 12" OAL

Stubby Length Drills - Screw Machine Length, Straight Shank:

Double End Twist Drill Bit - Straight Shank:

75-3018: 1/8" Double End Drill

75-3014: 1/4" Double End Drill

75-3030: #30 Double End Drill

75-3036: 3/16" Double End Drill

58-3018: 1/8" Cobalt Double End Drill

  • Cobalt coating increases hardness and durability