The Perform Series Leg Extension / Leg Curl combines several innovative features, including an angled back pad, adjustable ankle and thigh pads, and a range limiting device, allowing for effective isolation of both the quadriceps and hamstring muscles through a selection of leg extension and curl movements. Feature Tube: Tube of the functional part is primarily at a 3mm thickness. The weight stack cage is with D-shape tube size: 95 x 81.1 x 3mm and a racetrack tube size: 50 x 100 x 3mm which ensure ultra-durability and stability. Shrouds: Translucent ABS shroud at a thickness of 3.2mm ensures ultra-durability and shock resistance. Upholstery: High-density poly-foam and double stitches offer comfort and endurability. Cable: Self-lubricate American loos™ cable with nylon-coated 12 complex fiber ensures service life more than 250 thousand times. Bottle Holder: The bottle holder fixed on the cage is within reach. Adjustment: Adjustable Thigh/Foot Pads to allow easy operation and comfort. H