This is a simple vice which uses all 3d printed parts (apart from some tape and glue). It has a pretty strong grip on items, and its size is quite large to accommodate big objects. I think a great use for it is to clamp your other various 3d printed projects for finishing work, and sanding. Its an interesting tool which can demonstrate the complex geometries capable of FDM 3d printers, and its a cool piece with working parts. I printed this on my Robo 3D R1+, and my recommended infill / settings are down in the instructions. I hope you like it, thanks.
I reccomend using 35% infill on the Vice base and Vice clamp. For the other 3 parts I reccomend 90-100% infill.
You only need support on the Vice base. You should print that on its side with supports everywhere. The Vise Clamp should be printed with the largest face down. The screws should be oriented with the handles down on the bed, and for the Vice thread insert its necessary to print with the hole perpendicular to the build platform.
Put the screws and the Vice Clamp on as pictured. For the Vice thread insert, you need to use super glue to affix it into place in the hole on the bottom of the Vice Base. Be sure to use plenty of glue so it is in very solidly. I added some craft foam on the Vice Clamp to grip the items tighter, and put some duct tape on the opposite side to give good grip.