“lot of 10 new Carr Lane FC04 flat clamp in their original product bag. Packaging may have minor dirtiness from storage. Carr Lane part # FC04. For use with lock FM type fixed renewable recessed liner mounting for drill jig bushings. Milled locking flat (FM: flat milled). Standard mounting (USA) for recessed liner. Hole for 3/8" socket head cap screw. Mild steel with black oxide finish. See picture for further dimensions or specifications.”