The XMark Commercial Rated Leg Press and Hack Squat XM-7616 is your best bet to build lower body strength. This ergonomically designed machine allows you to complete leg presses and hack squats without a spotter. The frame on the XM-7616 is built for stability and to guarantee long lasting workouts time and time again. Smooth movements will let you build strong sculpted legs at your own pace. The detail that went into the XMark Commercial Leg Press and Hack Squat has separated it from the rest of the pack.