3 Piece Set of High Speed Steel Titanium Nitride Coated Step Drill Bits.

Set Contents:

• High Speed Steel Step Drill Bits
• Titanium Coated Steel
• 1/4″ Locking Hex Shank
• 6-Step Bit (inches):3/16″, 1/4″ , 5/16″, 3/8″, 7/16″, 1/2″
• 9-Step Bit (inches): 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″
• 13-Step Bit (inches): 1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2″