Corrosion-resistant, high-hardness 304 stainless steel rings made from premium raw materials. Rust-proof, corrosion-resistant, high hardness, non-toxic, and environmentally friendly. Safe & Robust: Heavy-duty, commercial-grade swing hooks designed for both children and adults, suitable for residential use with a capacity of 450 kg (1 piece) – ensuring safety. Easy to Install: Pre-drilled with two holes for bolting into wood or concrete beams. Includes 2 concrete anchors and 2 hex bolts. Concrete application: pre-drilled expansion screws install in minutes. Indoor and Outdoor Use: Suitable for both indoor and outdoor use, applicable to concrete ceilings and wooden beams, offering broader applications. Ideal as a wall hook for suspension trainers, rotating chairs, punching bags, or hanging any heavy object on a hanging rack. Package Contents: 2 x Heavy-duty round stainless steel swing hangers with ring, 8 x anchor screws, 2 x stainless steel snap hooks.