Leg press trainer/Hack machine TC322 is an excellent free weight strength training machine. The exercises you can do on the Leg Press/Hook Machine will help you develop physical endurance and strength, build muscle mass, and get rid of extra pounds in problem areas. One machine has two operating modes for performing leg exercises and a hook machine. To change positions, you should move the backrest from one platform to another and change the angle of the upper platform. The positions are changed using spring-loaded locks, so you only need to pull the lock with one hand and change the position with the other.