Step Drill Bit 4 42MM, HSS Titanium For Metal, Multiple Hole Drilling Cone with Tri Flat Shank, Stepped Up Bits DIY Lovers

YOKOCUT step drill bits are 100% genuine HSS 4241. 100% Satisfaction Guarantee: Every CORTOOL product includes 60days money-back & 24-month warranty and a friendly customer service. Perfect Step Drill Bits suitable for drill holes in various material： within 3mm/0.12 inch (Iron Plate, Copper Plate, Aluminum Plate); within 5mm/0.2 inch (Wood, PVC sheet, Insulation Boards). Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls etc. HSS combined with a titanium coating. More capable and durable. Two-Flute Design for smoother cutting. High Step design let you feel the stop and never drill bigger in mistake. HSS Titanium Step Drill Bit (4-42mm ). 9.5mm tri-flat shaft drives are suitable for all kinds of for home DIY power drills.