Vision Keystone Leg Extension / Leg Curl With Optional ComputerThe Vision Keystone Leg Extension Leg Curl with Incremental Weight (IW) is a versatile dual function selectorized machine designed to effectively train both the quadriceps and hamstrings. Users can easily switch between leg extension and seated leg curl exercises for balanced lower body development. The integrated Incremental Weight (IW) feature allows precise resistance adjustments, while the optional RC1 Rep Counter helps users track repetitions for