Rafter Mounts are designed to absorb noise and vibration for Heavy Bags up to 200lbs. With our proprietary compressed spring design, our Rafter punching bag mount will withstand thousands of strikes for a lifetime. Installation only takes a few minutes and is super easy! As you strike the bag, the spring reacts to each strike perfectly to absorb the hardest of punches and kicks! We also offer a heavy duty spring and a brace to make the Rafter Mount even stronger!