Step Drill Bit Set, Step Bit for Metal 6PCS, Titanium High Speed Steel 50 Sizes (1/8''-1 3/8'') with Automatic Center Punch and Aluminum Case, Multiple Hole Stepped Up Bits for DIY Lovers

High Durability & Universal Use Cortool Industry-grade High Speed Steel (60HRC) with titanium coating can reduce friction and run cooler, which ensures prolonged wear-resistance and durability.

Cortool 6PCS step drill bits are compatible with majority brands of electric drills or bench drills on the market.

Easy to store in toolbox or pocket.

Precision Drilling Cortool step drill bit has 118° Split Point which provides fast cutting with 3-Flat Shank provides fast and precise cutting while prevents walking and shedding; Laser calibration offers accurate positioning assistance.

Dual-Flute Design & Center Punch Cortool step drill bits are built with double flutes design clears particles quickly, decreases friction and heat for a faster, cooler and clean drilling performance.

Center punch is able to provide a precision location for the drilling work.