Materials and comfort: The leg extension and curling machine is built with a steel frame and foam rollers. It offers load capacity, stability, and easy operation. The extrathick foam pad is very soft and wearresistant, enhancing comfort and workout efficiency. Compatibility and installation: It features 16/18/26 mm holes and is fixed with bolts. Mounting screws and bolts are included, providing safe and quick assembly. As long as the hole diameter is suitable, it can be installed on any style of gym frame. Adjustability and versatility: Eight height adjustments accommodate different body sizes and training needs. Designed for multiple training methods, you can train leg muscles in seated positions or in alternative standing orientations. Spacesaving design: The seated leg extension and curling machine is compact and easy to install, allowing you to target specific muscle groups without occupying a large footprint. Use scenarios: Home gym: Attach to an existing frame with compatible holes to perform leg extensions and curls, saving space while delivering focused quad and hamstring work. Group or studio setting: Quick height adjustments for users of varying heights, enabling efficient, individualized leg workouts. Rehabilitation or conditioning: Controlled seated or alternativeposition leg work to fit rehabilitation or conditioning programs.