General description Neilsen Step Drill HSS Cone Bit Hole Metal Cutter Tool Set is designed for precision drilling in metal. This set includes three step bits that cater to various drilling needs, making it an essential tool for DIY enthusiasts and professionals alike. Technical specifications Includes: 1pc 3/16" - 1/2" six step bit 1pc 1/4" - 3/4" nine step bit 1pc 1/8" - 1/2" thirteen step bit Material: High-speed steel with titanium nitride coating Shank type: Quick change 1/4" hex shank Other information Complete with a nylon storage bag for easy organization and transport