If you are making your own bench, the ideal bench top should be 2.5 inches thick. If it's thinner, you'll have to use spacers, which is problematic. If it's thicker you'll have to pry out a 5lb hammer and chisel set, which was actually pretty fun. Invest 50 cents in some hardwood planks to attach to the jaws (0.5" thick, using some wood screws 2" long and 1/4" for one side). bolted to a workbench, and some 1.25" and 1/4" locking bolts with nuts and washers for the moveable jaw. You will need a…