HIGH QUALITY, CORROSION PROTECTION 304 stainless steel rings made of high quality raw materials. No rust, corrosion resistant, high hardness.SAFE ROBUST Heavyduty 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 predrilled two holes for bolting to wood beams or concrete. Including 2 concrete anchors and 2 hex bolts. Expansion screws predrilled 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.