Features: Adjustable resistance from 11 lb to 364 lb (5 kg to 165 kg) for progressive strength training Heavy-duty dual-spring system-coil spring plus flat spring-delivers a wide range of power-building resistance Digital counter in the handle with easy push-button reset for tracking reps Ergonomic soft-rubber grips with a durable urethane body for comfortable handling Steel lever mechanism provides smooth, reliable operation Convenient tether helps keep the device secure and within reach