Qualtech Step Drill Bit, Series: VAC, Imperial, #4 Letter/Wire, 3/16 in dia Minimum Hole, 1/2 in dia Maximum Hole, 12 Steps, 1/16 in Step Depth, 12 Hole, 1 Flutes, Radial Concave Flute, 3/8 in Shank, Round with 3-Flat Shank, 118° Point, Conventional Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Aluminum, Copper, Steel, Sheet Metal and Other Thin Materials.
Features
- Step drills are the only drills you can sharpen yourself (both tip and flute)
- Exclusive single radial concave flute creates perfectly round holes in metal, plastic wood and other thin materials without center punching
- Constructed of industrial grade high speed molybdenum steel, heat treated and temperature for long life
- Self-stating tip
- No center punching needed
- Automatically deburrs top side of hole
- Single flute cutting edge with sizes printed on each step 3 flatted shank size #4, 3/16 to 7/8 by 1/16 increments drill up to 12 different size holes 3/8 in shank
