The swing bracket is made of SUS 304 stainless steel, making it the safest and sturdiest option for outdoor swings. They are pre-drilled for easy installation and use, and the swivel hook is a hanging system that allows for safe, almost non-stop movement, and an easy-to-hook and unhook carabiner mechanism. Ideal for multi-child swings, indoor or outdoor sports landscaping accessories, hammock chair hanging hardware kits, porch swings, bench swings, yoga swings, hammock swings, porch hangings, gymnastics equipment, safety harnesses, swings, nests, nets, cocoons, wood Brackets, flying anti-gravity aerial yoga slings, climbing rope ladders with platforms or hanging chairs, high chairs, rails, nets, modules, swing bracket kits, gates, swing hooks or other sling equipment. Hang swings and slides or seat bracket accessories, also hang commercial grade swings, ring swings and super spinners. Dimensions: 70 x 40 x 100 mm, Hook distance: 20 mm, For roof installation of concrete units, please