HSS Step Drill Set Hex Shank Step

HSS Step Drill Set Hex Shank Step
Item Code: #110770, #110771, #110772, #110773

This four includes three standard step drill bits comes with 

• 4 to 12mm five-step bit
• 4 to 20mm nine-step bit
• 4 to 32mm fifteen-step bit
• 3 In 1 (4-12mm, 4-20mm and 4-32mm)

 Features:

1) Avoiding the inconvenience of a tri-flat shank to ensure a firm grip.
2) Easy drilling: Two-fluted design provides faster, smoother cutting.  
3) Provided with small pressure and the sets can cut through wood, sheet metal, steel and other surfaces. 
4) Automatic center punch: Delivers an automatic, high-impact, spring-loaded strike when pressed against surface, adjustable cap regulates strike