Item Type: Hammock Hanging Kit Material: Stainless Steel Color: As Picture Shown Application: For Yoga Training, Sandbags, Hanging Chair And More Product Size: Square Door Buckle: M8 Spring: M7 Expansion Screw: Approx.6x50mm/0.2x2.0in Weight: Approx.324g/11.4oz Bearing Capacity: 250kg/551.2lbPackage List 1 x Square Shape Door Buckle 4 x Expansion Tube1 x Spring1Stainless Steel Material: Made of high quality stainless steel material with high hardness, durable, rust proof, anti corrosion. 2Firm Welding: The welding connection is firm, not easy to crack or loose, the surface has no burrs to improve your using experience. 3Powerful Bearing: Has a high bearing capacity up to 250kg/551.2lb, able to support most of daily use. 4Stable Performance: The 4 holes on the mounting surface represent 4 screw fixing to ensure high firmness and integrity. 5Package Content: The package contains a square door buckle, 4 expansion tubes, a spring, for convenient installation.