【HIGH QUALITY, CORROSION PROTECTION】304 stainless steel rings made from high-quality raw materials. Rust-free, corrosion-resistant, and highly durable. 【STURDY AND ROBUST】These heavy-duty, commercial-grade swing hooks are designed for use by children and adults, and rated for residential use up to 500kg, ensuring safety. 【EASY TO INSTALL】We have pre-drilled two holes for bolting onto wooden beams or concrete. Includes 2 concrete anchors and 2 hex bolts. Pre-drilled expansion screws for concrete applications, installed in just minutes. 【MULTIFUNCTION】Ideal for use as a wall hook for sling trainers, suspension trainers, punching bags, gym equipment, yoga equipment, and swings, indoors or outdoors. 【PACKAGE CONTENTS】1 x durable round stainless steel eye bolts with ring, 4 x anchor screws, 1 x stainless steel spring-loaded carabiner.