High Quality: Made of stainless steel, higher hardness, non-deformable, anti-rust, glossy and bright , non , environmentally friendly and harmless. Solid design, abrasion , strong load-bearing, attractive and practical. Function: It is a permanent fixture to a wall or ceiling joist to allow the use of your suspension system or resistance bands. Non-detachable hook and base plate design, making it and stable in use. Use: Install it on the ceiling in an area you need dependable, smooth rotation without twisting chains or ropes. Multi-purpose: Suitable for indoor and outdoor use, perfect for hanging swings, chairs, hammocks, aerial silks, Yoga Swing Suspension, punching bags or any other heavy object from an overhead mount. Material:304 stainless steel colour:Silver Size: M5 Package Contents: 4* U ceiling button 4* spring clasp 16* screw 16* anchor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.