HIGH QUALITY, CORROSION PROTECTION 304 stainless steel rings made of high quality raw materials. No rust, corrosion resistant, high hardness. SAFE & ROBUST Heavy-duty commercial grade swing hooks are designed for use by children and adults, and designed for residential use at a 500kg rating , they are secure. EASY TO INSTALL We have pre-drilled two holes for bolting to wood beams or concrete. Including 2 concrete anchors and 2 hex bolts. Expansion screws pre-drilled for concrete application installed in just minutes. MULTIFUNCTION Optimal use as wall hook for sling trainer, suspension trainer, punching bag, gym, yoga, indoor swing or outside. PACKAGE CONTENT 1 x durable round stainless steel trigger guards with ring, 4 x anchor screws, 1 x stainless steel spring carabiners.