High Speed Steel Step Drill Bit Sets Hex Shank Multiple Hole Step Drill 3Pcs

High Speed Steel Step Drill Bit Sets Hex Shank Multiple Hole Step Drill Bits for Woodworking 3Pcs (4-12/4-20/4-32mm) Product selling point: High speed steel along with the titanium coating ensures extreme durability will stay new and it can shiny for years to come. Different sized shanks ensure compatibility with 4-12/4-20/4-32mm chuck sizes. High speed steel step Drill Bit Set provides fast and smooth drills on steel sheets aluminum sheets wood board plastic board etc. (the board must be smaller in thickness than the height of step drill bits). All drill bits come in special bag for easy transport and storage. Before use，please mark the spot that you are to drill for easier drilling and improved drill bits life. Product parameters: Material: high speed steel4241 Specifications: 4-32 4-20 4-12 Hex shank size: 6.35MM Weight: 248g Package content: 3x step drill