BeneLabel Heavy Duty Boxing Punching Bag Hanger Chain with Spring, 350 LB Capacity, 360° Rotation Wood Beam Holder with 4 Chains and 4 Carabiners, 2 Wood Screws for Wooden Sets

???BeneLabel Heavy Duty Boxing Punching Bag Chain perfect for Boxing, MMA, Muay Thai or any of your favorite contact sports heavy bag training. Suitable for the home gym, commercial gym or health club. ?Install on Wood ?This requires you to first understand how to use the wood screws ?Pre-drill two holes in the wooden beam, it is recommended to use a drill bit smaller than 0.2" ?Pass the screw through the hole in the base of the swing hanger, and use a wrench or electric drill to tighten the screw ?Install on Concrete(Use with Enter the wall to expand the colloidal particles) ?This requires you to first understand how to use the expansion bolt ?Drill two holes in the ceiling, and then use expansion bolts to fix the swing hanger on the ceiling ?Connect the carabiner to your sandbag. SIZE ?Each chain is 11 inches long ?Spring length 6 inches ?The total length is 23.2 inches ?The diameter of the holes on the swing hanger base is 0.31 inch, and the hole spacing is 3.3 inch PACKING LIST ?1 Heavy Duty Wood Beam Holder ?1 Swing Spring ?2 Hexagon Wood Screws ?2 Enter the wall to expand the colloidal particles ?4 Chains ?4 Carabiners ATTENTION ?Its maximum weight is 350 LB.Be sure the surface to which you are mounting can support the weight and forces involved. ?In order to use safety,pls check thread rod and nut are weled together.Regularly check if the fitting is deformed. ???If you are dissatisfied with any reason, return your order for 30-Days for full refund. Keeping you satisfied and providing you with the friendliest customer service is our number one goal. Better products, and the best in customer satisfaction.