The Delta Series LR308 Mag Well Vise Block is designed for use with the Tipton Best Gun Vise but can also be mounted directly to a workbench. Simply inserts into the magazine well and provides a steady base for cleaning or light gunsmithing on your LR 308 in either breech or closed position. Easily installs into the aluminium track on the Tipton Best Gun Vise. Loaded with handy features this tool is a must have for anyone with an LR 308.