Size: 3-6, 6-8, 8-11, 11-14, 14-18, 18-25, 25-35, 35-50mm.

         1/8"-1/4", 1/4"-5/16" ,  5/16"-7/16", 7/16"-9/16", 9/16"-3/4", 3/4"-1", 1"-1-3/8", 1-3/8"-2".

High Speed Steel or carbon steel.

Medium duty or heavy duty.

4pcs sets,6pcs sets,8pcs sets, 10pcs sets available.

Ideal for quickly and easily removing broken, damaged or embedded screw. Suitable for use with all standard variable speed drill.