Apply to remove all kinds of broken head bolt, screw.

Size: #1 1/8"-1/4" (3-6mm), #2 1/4"-5/16"(6-8mm), #3 5/16"-7/16"(8-11mm), #4 7/16"-9/16" (11-14mm), #5 9/16"-3/4" (14-18mm)

Material: CR-MO, Black finish

Packing: Plastic box+ Shrink