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/552lb. 1 x Revolving Door Buckle1 x Spring4 x Screw4 x Sleeve Item Type: Ceiling Hanging Kit Color: As Pictures ShownMaterial: Stainless SteelBearing Weight: 250kg/ 551.2lbWeight: Approx.300g/ 10.6ozApplication: Yoga Training, Hammock, Hanging Chair, Etc.Style: Revolving Door Buckle M8+Spring Steel M7+5x40mm Self Tapping Screw+Rubber Sleeve