●PROVIDING RELIABLE PERFORMANCE: Heavy bag spring is made of high quality spring steel, which reduces the movement and vibration of the heavy bag and reduces noise in the home gym. ●360 SWING SWIVEL: The innovative swivel and close spring design offers safe and smooth and frictionless rotation.Very Compact and Symmetrical Swivel. ●EASY TO INSTALL: Package include a spring, a swivel and 2 carabiners. Easy to connect swing hanger and punching bag. A unique one piece design and can be installed in minutes. ●INDOOR & OUTDOOR USE: Heavy bag hanging kit perfect for hanging boxing, MMA, Muay Thai or hammock swing porch chair, up to 500LB capacity. ●100% SATISFACTION GURANTEED: If you are dissatisfied for any reason, return your order within 30-Days for full refund, we will always go above and beyond to ensure you are happy with your customer experience with SELEWARE. US Patent Pending. All Rights Reserved.