DNZ's Game Reaper is precision machined from a solid block of top-grade billet aluminum and is custom made to fit each type of firearm and align perfectly with your rifle receiver with no moving parts between the firearm and the scope. The Game Reaper absorbs shock and withstands temperature extremes better than steel mounts. Base screws are 6-48 X 1/4 long and ring screws are 6-40 X 5/8 long. Both screws use 7/64 Allen wrench. Misc Mounting Hardware Included Type 1-Pc Base & Ring Combo Model Game Reaper-Savage Style 1-Piece Finish Black Matte Pieces 1 Series Scope Mount/Ring Combo Gun Type Rifle Material 6061-T6 Aluminum Mount Type To Receiver Ring Height High Mount Height 1.17" Rings Included Yes