5PC SAE COBALT SPIRAL FLUTE STEP DRILL BIT SET

Cobalt Steel Bits Provide Longer Life & Cut Faster Than High Speed Steel Two Sprial Flutes, Automatically Deburrs As You Drill & Provides Better Chip Removal Tri-Flat Shank For Sure Grip, 135 Degree Split Point, Self Centering 1/4" Shank: 3/16" To 1/2", 6 Steps 1/4" Shank: 1/8" To 1/2", 13 Steps 1/4" Shank: 1/4" To 3/4", 9 Steps 1/4" Shank: 1/4" To 1-3/8", 10 Steps 1/4" Shank: 3/16" To 7/8", 12 Steps