This is a mini screw clamp/vise that can be useful for holding two pieces together or to a work table.

It prints quickly and in place, with no assembly required, well, except screwing the screw I guess. :)

They print really well without any supports, though there will be a few stray filaments depending on how well your printer does overhangs with the filament that you're using.

There's a 14mm and a 20mm wide version, so pick whatever works for you.

EDIT: fixed alignment of 20mm piece.

Print instructions

Rafts: No
Supports: No
Resolution: 0.2mm
Infill: 40%

Notes:

Does not need supports and both parts should release quite easily. These clamps have a pretty high tolerance.

I printed them with PETG and they look amazing. I'm guessing PLA will have less problems with overhangs but will be a bit more brittle and less strong.