Rubber pad that adds one full inch. Prevents slips and softens recoil. Easy to install, no extra holes need to your stock, just remove the butt plate and replace with the rubber pad. Works on factory wooden stocks for Mini-14, Mini-30 and 10/22 rifles. This is not designed to work on the Mini-14 Ranch, PC carbine or synthetic stocks, works on the factory wooden stocks only. Not manufactured by Ruger.