Triangular Corner Clamp

This is a triangular corner clamp utilizing l bolts. The clamp has a slight lip on its outer edge to let it sit on the work material. I made the L bolts out 4-½" x ¼"-20 machine bolts and chased the threads down further with a die. You may need to adjust the length of these bolts to suit your project needs. 

I used the ¼"-20 knob designed by https://www.printables.com/@ShaneCreech_556569 https://www.printables.com/model/461152-knob-14-20/files 

A small vice that has multiple ways to secure objects, using spool pins or jaws. Versions with and without a base plate.

https://www.printables.com/model/1212482-small-universal-clamp-bench-or-portable-vise

Another clamp for smaller projects I designed uses Neodymium magnets to hold model parts together for gluing.

https://www.printables.com/model/179135-magnetic-corner-clamp-for-model-construction

This is another clamp for smaller projects I designed to hold model parts together for gluing.

https://www.printables.com/model/230424-right-angle-90deg-corner-clamp

Here is another style of corner clamp, a square clamping jig that lets you a variety of clamps (C, spring, bar, etc.) to secure two parts together at 90°.

https://www.printables.com/model/840750-right-angle-corner-clamping-square