These adjustable toe clamps have a low profile to keep the clamp out of the way from machining operation. Allows for quick removal and insertion of parts. T-slot nut and socket head cap screw are included. Body made from 4140 alloy steel. Sliding jaw made from 4140 alloy steel, with a black oxide finish, and precision ground. T-slot nut made from 1045 steel with a black oxide finish. Socket head cap screw made from 4135 steel with a black oxide finish.