Pianpianzi under Bed Storage Bins with Wheels Storage Bins for Camping under Bed Storage Tote High Drill Step Hex Shank Hole Steel Speed Drill Multiple 3Pcs Sets Bit Step Tool&Home Improvment

Different sized shanks ensure compatibility with 4-12/4-20/4-32mm chuck sizes. Weight: 248g Specifications: 4-32 4-20 4-12 High speed steel step Drill Bit Set provides fast and smooth drills on steel sheets aluminum sheets wood board board etc. (the board must be smaller in thickness than the height of step drill bits). Material: high speed steel4241 Hex shank size: 6.35MM 3x step drill All drill bits come in special bag for easy transport and storage. Before use，please mark the that you are to drill for easier drilling and improved drill bits life.