The Sorinex Original Load Trainer was designed by an active US Special Forces Operations Soldier to systematically vary the load on his ruck during training and qualification sessions. The Load Trainer is made in the U.S.A. and a great training tool to prepare for various tactical testing, military qualifications, ruck runs, and training walks. It simulates the load of a packed ruck by securing standard weight plates to your back. Each unit weighs 6.5lb and approx 10lb. when mounted on A.L.I.C.E. Pack Frame (ALICE PACK FRAME NOT INCLUDED). Mounting the Sorinex Load Trainer to your A.L.I.C.E. Frame is simple, using only 7/16″ or 11mm wrench to fasten the included hardware. The included hitch pin attaches to the end of the weight pin to ensure plate (Olympic sized only) does not slip off when jostled on ruck marches or hiking.