【Grade 70 heavy steel】 Working load limit is 6600 lb. Heat treatment makes the hook more durable and tough. 【Easy to Solder】The bottom edge of the grappling hook is beveled, easy to weld to any surface or body. 【Multifunction】Grab hooks work well with chains and ratchet binders for securing your load. can be welded on tractor bucket, truck bumper, Forklift. 【Widely Used】Weld-on hook can be used for lifting heavy objects, port transportation, farm work, construction site construction and other fields. 【Package】Include 4pcs 3/8 inches weld-on hooks