Step drill allows to cut several holes with one drill without changine bit constantly.
Coated with cobalt, this step drill is more durable and better heat resistance
Two-flute design enables a faster, more stable and smoother cutting .
Compared with the common drill, this step drill can deburrs holes while drilling and 3-sided shank prevent slipping in drill chuck. Step drill, also called multifuctional drill, can cut straight-flute, spiral-flute, single-flute.