Punch, kick and then quickly get back to your starting position Hang up your boxing bag with the SKTM Boxing Bag Chain Set. This metal 4-points chain ensures that the boxing bag hangs straight. The punching bag has 4 attachment points and comes with a swivel. The 4 chains provide an optimal distribution of strength when you punch or kick the boxing bag. The swivel or cable creates a rotating shaft that connects the chains-you can see the effect when punching. The benefits of the SKTM Boxing Bag Chain Set, 4-points chain, Includes swivel, Solid metal.