1)ACTOOL industrial HSS step drill bit with optimized tip start fast.

2)ACTOOL industrial HSS step drill bit with double straight flute design give you maximum efficiency during drilling.

3)ACTOOL industrial HSS step drill bit is made of industrial-grade M2 high speed steel, heat treated for maximum durability.

4)ACTOOL industrial HSS step drill bit use 3 flatted shank for heavy duty application, prevent slipping in drill chuck.