| High Speed Step Drill Set - 3 Sizes 6 step bit: 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 9 step bit - 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 13 step bit - 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, 1/2 Constructed of Titanium Coated Steel Reduces Heat & Friction Caused During Drilling Stops w/ Each Step to Prevent Drilling Larger Holes than Intended | |