SummaryThis clamp is remixed from Hobby Clamps, by Rotoscan. I have added a hole at the bottom of the rail, and 2 small pins that can be glued into place after assembly (see pictures). This is designed to stop the jaw from sliding off and getting lost in your tool box... I printed mine on a Replicator 2 at 0.3 layer height, with 2 shells and 50% fill and it worked just fine.