The leg curl is an isolation exercise that targets the hamstring muscles. The exercise involves flexing the lower leg against resistance towards the buttocks. Range of motion feature allows user to customize start/stop range; perfect for rehabilitation users; Adjustable leg pad accommodates different leg lengths, allowing users to achieve proper leverage; Incremental 3.3 and 6.6 lb (1.5 and 3 kg) micro-loading adjustment; Deep-groove, 5-inch (12.7 cm) shrouded pulleys provide faultless cable tracking; Cold rolled steel weight stacks with noise dampening; Stainless steel guide rods resist rust and stay smooth; Internally lubricated 1500 lb (680 kg) steel aircraft cables provide quiet, smooth operation.