1、[Firm Connection] Complete welding, not easy to break, loose and overflow, smooth surface without burrs. 2、[Durable Material] Made of stainless steel material, strong and durable, anti rust, anti corrosion, and high hardness. 3、[Stainless Steel Spring] Can reduce the abrasion caused by impact and bumps, and improve the service life of the installed parts. 4、[Usage Scenes] You can hang hammock in the bedroom, swing in the yard, or hang sandbags in the gym. You can hang it according to your needs. 5、[Strong Load Bearing Capacity] 4 holes on the revolving door buckle use 4 screws to ensure firmness and safety, and the load weight up to 250kg/551.2lb. Item Type: Ceiling Hanging Kit Color: As Pictures Shown Material: Stainless Steel Bearing Weight: 250kg/551.2lb Weight: Approx.300g/10.6oz Application: Yoga Training, Hammock, Hanging Chair, Etc. Style: Revolving Door Buckle M8+Spring Steel M7+5x40mm Self Tapping Screw+Rubber Sleeve 1 x Revolving Door Buckle 1 x Spring 4 x Screw 4 x Sleeve