Feature: 1. The stainless steel hook ensures the safety during exercise, and has better bearing capacity, with a loadbearing capacity of 220.5lb. 2. The hinge is upgraded, the lock sleeve is sturdier, and it will not fall off during use. Comes with electroplating lock, with fixed locking device. 3. The inner of the upsidedown boot adopts a thickened sponge sheath with a thickness of about 3cm, which is more comfortable to wear and protects the feet from being injured. 4. Helps relieve pain and stretch the muscles of the neck, back and shoulders, separate the compressed intervertebral discs, and relieve back pain. 5. The upside down boots can be perfectly fixed on ankles and feet of any size, which is a practical fitness equipment. Specification: Item Type: Hanging Pull Up Boots Material: Stainless Steel + Sponge Height: Approx. 20cm/7.9in Width: Approx. 14cm/5.5in Diameter of Upside Down Hanging Buckle: Less than 3.5cm/1.4in Bearing Weight: 100kg/220.5lb Application: One size fits for most people. People with thinner legs should wear boots or use extra padding for secure fit. Use: Set the sturdy hook on the crossbar, and fasten the cushion. The comfortable soft cushion on both sides makes your ankle contour fit. Package List: 2 x Hanging Pull Up Boots 1 x Rope Note: When using, make sure that the hook is firmly fixed on the slide bar, ensure that the cross bar has a strong bearing capacity, and ensure that the ankle is tight and comfortable.