One set screw and its appropriate wrench are included with the C-10. This makes it easy to keep the clamp from twisting without using adhesives or purchasing extra hardware.

The C-10 clamp comes with a 3/8" to 1/4" brass reducer bushing that you can use if your application requires a 1/4" threaded hole instead of a 3/8" hole.

C-30 Quick-Release Clamp (for Old Style Wimberley Head)