Instead of permanently mounting my 6-in. vise to a work-bench, I attached it to scrap plywood so I can clamp it wherever I need it. Stack two pieces of 3/4-in. plywood and screw them together with 1-1/4 in. drywall screws. Mark the vise-mounting holes on the plywood and drill 3/4-in. guide holes through both pieces. Recess the nut by drilling through the bottom sheet with a 1-in. spade bit using the 3/4-in. hole as a guide. Fasten the vise to the plywood with bolts sized to match the vise-mounting holes. If the bolt shafts are too long, cut them off with a hacksaw. — LuAnn Aiu. Plus: Learn how to use vise grips to pull nails.
This super-strong and simple-to-build workbench is may be the project you've been looking for a long time. You have to select some free workbench plans to create yourself a working table in your shed that after you can use it when you are working on your projects and maybe it can provide you some extra storage, depends upon which plan you are choosing to DIY.