Made of chrome molybdenum.
Heat treated.
Quick & Easy way to remove broken screws,pipes, bolts & studs.
Size: 7/64",9/64",5/32",1/4",19/64"
Capacity: No.1 1/8"-1/4", No.2 1/4"-5/16",No.3 5/16"-7/16", No.4 7/16"-9/16", No.5 9/16"-3/4"