Work Bench Friction Clamp

This is a clamp designed to work with perforated workbenches. some workbenches have different sized holes for affixing work pieces, these are designed for 18mm, and 20mm holes. They are a friction fit in the hole, and the workbench type they are made for has a two piece top which clamps together with two large threaded rods.

I hope someone finds these useful!

Happy Printing!