Frankenclamp

Frankenclamp! The clamp connector and extender. 3d-print this adaptor for Irwin Quick-Grip clamps and you can extend the reach of your clamps. Works well as long as the middle part, where the clamps connect, doesn't get in the way!

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https://www.instructables.com/3D-Printed-Gadgets-for-Woodworking/
https://www.instructables.com/More-3D-Printed-Gadgets-for-Woodworking/