The Hoist HD-3400 Dual Series Leg Curl Leg Extension is a commercial-grade fitness machine designed for targeted lower-body strength training. This dual-function unit, featuring multiple adjustable padded rollers for customized ergonomic alignment and comfort, allows users to easily transition between performing lying leg curls to develop their hamstrings and seated leg extensions to build their quadriceps. Constructed with a heavy-duty steel frame, precision bearings, and a weight stack covered by an integrated guard, the HD-3400 provides a smooth, durable, and space-efficient solution suitable for varied fitness levels in gym or home environments.