These 3D printed clips allow you to easily organize model kit sprues and save table space. Attach the clip onto the sprue (near a corner or the middle) and then place anywhere on the table. The clips will stay on the sprue when you pick it up to cut a part out.

Designed with Gundam model kits in mind, though it should work with other model kits.

If the sprue is too thin, simply add some tape to the sprue to make it thicker. Model masking tape works well.
If the sprue is too thick, shave it down with a hobby knife.
If the sprue is unstable when standing up add a second clip to improve stability.