Durable UseBearing swing hardware has 3 mounting holes that use triangular balance design, improved stability and safer than 2 holes installed, made of high quantity metal, can support up to 1000 pounds. A good indoor outdoor backyard playground playhouse swing set bracket part accessories hardware360 Swivel Swing HangerHeavy duty swing hanger bearing swivel hook is suitable for 360 swing products, indoor outdoor playground tree tire swing for swingset bracket, saucer swing aerial hammock pod swing, also for a home gym training hardware to hang yoga gym swing punching bag boxing heavy bag sandbag100% SATISFACTION GURANTEE If you are dissatisfied for any reason, return your order within 30-Days, we will always go above and beyond to ensure you are happy with your customer experience with . US Patent Pending. All Rights ReservedEasy InstallationHammock swing hardware kit comes with 3 wood screws and 3 expansion iron bolts. Using screws/bolts through holes to fix it on the wooden beam/concrete. Then you could enjoy the swing. (Please see the description section for the detailed installation method)Packing List One bearing swivel swing hanger, one carabiner, 3 screw for wooden set and 3 expanded iron tube for concrete ceiling