5PCS HSS Titanium Step Drill Bit Set with Automatic Center Punch

Features

• Material: High Speed Steel,Alloy Steel 
• Shank Type : Hex
• Finish Type: Titanium, Steel
• Size:
  1. 1/4″ to 1-3/8″ 10 Steps (1/4”, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″)
  2. 3/16″ to 7/8″ 12 Steps (3/16”, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″,7/8″)
  3. 1/4″ to 3/4” 9 Steps (1/4”, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″)
  4. 1/8″ to 1/2″ 13 Steps (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”)
  5. 3/16″ to 1/2″ 6 Steps (3/16”, 1/4”, 5/16″, 3/8”, 7/16”, 1/2”)