1. Heavy duty construction Made of heavy duty steel, this leg curl extension machine provides a sturdy and stable frame capable of supporting high intensity leg training. Its abrasion-resistant powder coating helps prevent corrosion and extends durability. 2. Versatile compatibility Designed to fit pipes with 16, 18, or 26 mm holes, this machine comes with all mounting materials for easy installation. Please confirm that your fitness equipment is compatible before purchase to ensure seamless integration. 3. Adjustable for custom fit With 8 adjustable positions, this sitting leg extension and curl machine accommodates different body sizes and training needs. It supports leg work and is suitable for targeting other muscle groups as well, including triceps, biceps, chest, shoulder and back muscles. 4. Targeted muscle training Specially designed for focused muscle group training, this device is an excellent tool for developing and strengthening leg muscles. Its efficient design makes it suitable for use in both home and gym environments. Use scenarios - Home gym use Set up in a compact space to perform leg extensions and leg curls with adjustable positions to match your height and leg length. The sturdy steel frame and durable finish support high-intensity workouts over time. - Small to medium gym setup Install in a shared facility using the included mounting materials. The 16/18/26 mm hole compatibility allows integration with existing rigs, enabling stable, reliable leg training in a busy environment. - Personal training or mixed routine Use the 8-position adjustability to tailor workouts for different clients or goals. While focused on leg work, the design supports a range of exercises that engage nearby muscle groups such as triceps, biceps, chest, shoulders and back as part of a versatile training session.