9-36mm Step Drills with 4 straight Flutes;
 Step Range: 9-36mm;
 No. of Steps: 10;
 Shank Size: 12mm

 
Deep-ground flutes of step drills with 4 cutting edges guarantes absolutely chatter-free working.
The reduced load of the cutting edges allows a higher feed rate especially for soft material like non-ferrous metals.
The cone makes it easier to withdraw the tool from the material.