SELEWARE is Innovative suspension system for almost nonstop movements without noices or compromises in security and easy hang in/out mechanism for the carabiner. developed for multi-child swings, it is also ideal indoors or outdoors for sports playscape accessories, plastic coated swinging chain inside or outside door, hanging swing n slide bracket accessories or swings seat, also hangs commercial grade swings, super spinner, gymnastics rings equipment, trapeze rings swings, porch swing springs, hammock cradle chair suspension hardware kit, swing seats belts, flying antigravity aerial yoga sling inversion, climbing rope ladder with platforms or hanging chair, baby infant toddler buckets swings, nest , web, cocoons, a ez wood frame bracket, sky chair, orbit, net, pod,  swing-set brackets kit, door, swivel hook snap or other swing set stuff. DIMENSIONS: 2.8 x 1.57 x 3.82 inches, two holes distance: 1.9 inches, expansion bolts diameter: 0.47 inches, height: 3.35 inches, pls use use 1/2" drill size for the concrete. WHAT YOU GET: One swing hangers with 2 expansion bolt and 2 screws Attention: In order to use safety, pls check thread rod and nut are weled together. About SELEWARE: Since 1998, SELEWARE is a design factory and global selling Kitchenware and Houseware items with global trade mark SELEWARE--selected housewares for you, to provide a aesthetic, advanced cultural, practical, durable use product is our goal which convey emotion, bring back memories and surprise. product material categories including Plastic, Glass, Metal, Ceramic, Wood etc, all need comply with BPA free, Phthalate free, Environmentally friendly and healthy, Safe, long term use.