【360° ROTATION DESIGN】 360° Free Rotation Attachment Hook with Pull Buckle that Opens Easily. Innovative and patented design. 【HIGH QUALITY, PROTECTION AGAINST CORROSION】304 stainless steel rings made of high quality raw materials. No rust, corrosion resistance, high hardness. 【STURDY ON】Heavy duty commercial grade swing hangers are designed for use by children and adults, and designed for residential use at a 500kg rating, they are secure. 【EASY TO INSTALL】We have pre-drilled two holes for bolting to wooden beams or concrete. Including 2 concrete anchors and 2 hex bolts. Pre-drilled expansion screws for concrete application installed in just minutes. 【MULTIFUNCTION】Best use as wall hook for sling trainer, suspension trainer, punching bag, gym, yoga, swing inside or outside.