Sturdy material: 304 stainless steel ring made of high quality raw materials. No rust, corrosion resistance, high hardness, non-toxic and environmentally friendly. The maximum load capacity of this productis 450 kg, which is suitable for all scenes. 360 Degree Rotating Design: Rotating function makes this hook more flexible. With a detachable self-rotating hook, innovative design makes it more flexible to use. Installation is very simple, just pre-drill twoholes in the wooden beam or concrete, then install the screws. Easy to install: Two holes are pre-drilled for attaching bolts to wooden beams or concrete, and pre-drilled expansion screws for concrete application are installed in minutes. Field of application: for indoor and outdoor use, suitable for concrete ceilings and wooden beams, the best anchoring solution for all suspension straps and resistance trainers, swings,hammocks, sandbags, training slings, awning kits