You can expect nothing but the best from these two machines. Unique pop-pin cam adjustment allows users to select starting position. Oversized contoured pads, biomechanically accurate foot posts and ergonomically correct bent-knee design make your workouts safe, comfortable and more effective. Four sealed pillow block ball bearing systems ride over solid steel axles for ultimate smootness and friction-free action. Angled seat eliminates lower back stress while no-slip hand grips assure stability. Superior biomechanics assure each cam axis is directly inline with each hip joint axis for maximum results in minimum time.NOTE: This machine is either an Inner or an Outer Thigh Machine. The basic unit can be configured to be used as one or the other, not both. In order to have both an Inner and Outer Thigh Machine, two units would need to be purchased.