Attachmate: Wing Chun Dummy Trainer VERY PORTABLE - Easy to assemble and disassemble for use with your free standing or handing punching bag. FITS OVER ALL FREE STANDING AND HANGING BAGS - Adjustable straps make the Attach-Mate compatible with any free standing or hanging bag. Will not work with the Century BOB type bags. SPRING ACTION ARMS - The spring action is achieved by the way the arms are connected through the flexible base plates. There are no actual springs in the arms. LONG LASTING DURABILITY - Able to withstand tough work outs and keep on going. If, on the off chance you manage to damage it, let us know and we will send out replacement parts asap. DON'T SPEND THOUSANDS ON A WOODEN DUMMY - The Attach-Mate makes wing chun dummy training possible with your existing bag at a fraction of the cost of a traditional wooden dummy. It only makes financial sense to give this a try before spending your hard earned cash on a full size very expensive wooden dummy.