Firstlaw Fitness Spider Mount 140 - Heavy Punching Bag Hanger - for Heavy Bags up to 140 LBS - Made in The USA 360 DEGREE SPHERICAL MOTION PROVIDES THE BEST NOISE AND VIBRATION DAMPENING YOU CAN BUY DESIGNED FOR HEAVY PUNCHING BAGS UP TO 140 LBS EASILY MOUNTS TO DRYWALL OR OPEN FLOOR JOIST - 12" OR 16" CENTER TO CENTER BUILT IN BEARINGS PROVIDES SMOOTH SWIVEL AT CONNECTING LINK 100% MADE IN THE USA - LIFETIME WARRANTY - 100% SATISFACTION GUARANTEE