DNZ Rapid Height ToolA new, quick and easy to use measuring bar for checking what height scope mount you need to mount a scope. It will check height needed from top of firearm receiver or barrel to bottom of scope tube. The height can be checked and measured so you will know what height mount to use or to order. You will also be able to see exactly how high off the barrel the scope will sit after mounting. This product will work with any mounting system made. This product