Features and Benefits:

• Zirconium Coating Reduces Wear For A Longer Tool Life Premium High Speed Steel Designed To Cut Through Thin Hard Metals 12 Step Cuts Holes From 3/16 To 7/8, 1/8 Step Depth 3/8 Shanks Fit All Popular Drills Step Drill Bits Are For Cutting Ferrous and Non-Ferrous Metals, Plastics and Wood Up To 1/8 Thick.
• Its Double Flute Design Reduces Chatter and Deburrs Holes

Connector 1/2 in. F x 1/4 in. M