This is a customizable clamp that you can use for normal clamping or, as in my case, as a door stop. This is the “Adjustable Super Clamp” by 247generator. In my main profile, I made this 100% infill in order to use it as a door stop for a very heavy metal door that we need to hold open; before the clamp we were using a regular door stop which kids would play with and would be in the way of people's feet. By using this clamp we can keep it away from children and it moves with the door as it opens and closes. In the photo I also wrapped it with some foam that was then covered in electrical tape as a precaution, but at 100% infill this in incredible strong and survived by hammer whacking tests.

Depending on your needs, if you just need a light clamp for wood wording or crafting, open it up in the slicer and adjust the infill as needed. The clamp's mouth as-is measures around 64mm / 2.5 in. The incredible original OpenSCAD files is also uploaded here and you can adjust many, many different parameters to make any type of clamp to fit your needs. The screw/bolt has the right amount of tension and is not hard to adjust.