Ideal® Quick Change Step Drill Bit, Quick Change Step Drill Bit Item, Includes: 35-521, 35-522, 35-523 Quick Change Step Drill Bits, Material: High Speed Tool Steel, Number of Hole Sizes: 13, 11, 16, 3 Piece, 1/4" dia. Shank Size, Size: 1/8 to 1/2" Bit dia. (35-521), 1/4 to 7/8" Bit dia. (35-522), 1/4 to 1-1/8" Bit dia. (35-523), 1/8" (35-521), 1/16" (35-522), 1/16" (35-523) Step Thickness
- New aggresive split-point tip that lasts longer and starts faster than competition
- High speed tool steel - most durable steel available for cutting tools
- Double tempered for superior tip life
- Double fluted and blended radius steps for smooth, accurate drilling
- 1/4" quick change shank can be used in standard 3 jaw chuck, impact drivers and quick change drill chucks