4-blade step drill for drilling holes in stainless steel and iron
Recommended rotational speed is 175 - 450 mi-1, iron 300 - 800 mi-1, shank: cobalt highs, blade part: cobalt titanium shaft diameter is 0.2 - 0.6 inch (6.35 mm) 18 V, 4 blade type allows for drilling work close to a true circle