This vice is functional and strong, it would be great for hobbyists and model makers. Even schools could possibly use these as they are safer than metal ones.
Print the main two pieces with 0.30 resolution and 50% infill. You can print the screws with 0.30 resolution but you will need to set at least 80% infill to make them as strong as possible. I suggest you to put some oil between the moving parts. Print the biggest piece as shown in the photo and the two screws vertically. It took me six hours to print this Vice.