Can you show a picture of the backside? It's a woodworking face vice, so there should either be a couple ears on the backside with holes pointing up to secure to the underside of a workbench, or there should also be a couple holes through the fixed jaw to secure to the face of a workbench. It looks to me like there are two holes that are currently used to hold those wooden jaws on that can be used to mount the fix jaw to the edge of a bench. But without a picture of that back it's tough to say if that's the only option. Don't think I've ever seen one without ears or another means of mounting from underneath, but I certainly have not seen them all. Handy vises to have anyway. One can never have too many different ways to securely hold something. This reminds me, I need to remount mine somewhere.....Been sitting a long time since the dismantling of our old woodworking shop at my Dad's place, and subsequent jamming of all that shit in my barn.