The Majestic Arms Bolt Racker allows for effortless cocking of your RugerA(R) Mark series pistol. Lightweight aircraft grade aluminum Easy to install Can be mounted for right or left handed shooters Flat black anodized finish 2 types for different variations of production Type 1 fits Ruger Mk I & II(TM) models Type 3 fits 2006-present production models of the Mk III(TM) as well as the 22/45(TM) Mfg: Majestic Arms SPECS: Type 1 fits RugerA(R) Mk I & II(TM) models. Type 3 fits 2006-present production models of the Mk III(TM) as well as the 22/45(TM).