No Spotter? No Problem! Smith Machines offer an added level of safety for your home workout. A Smith Machine features a barbell on vertical fixed rails, with lock-out points up and down the track. A quick twist of the wrist engages these points, locking the barbell in place. This eliminates the need for a spotter, providing weightlifters with more independence. Perform squats, shrugs, bench presses, bent over rows and more safely and with greater stability.