【Widely used.】 High quality stainless steel spring for hanging chair, hanging seat, hammock, double swing or baby swing, for everything you want to attach to the ceiling and need to swing. 【Quality material.】 304 stainless steel for corrosion and rust protection, with a long service life. The telescopic spring has been tested for tensile force and began to deform at about 250 kg without breaking. 【The spring helps to relieve shock loads.】 The steel spring allows movements to be cushioned in a light and pleasant way. promotes relaxation, especially when attached to a concrete ceiling, the spring reacts gently and ensures pleasant turning and swinging movements. 【Easy to assemble.】 Supplied with 2 large carabiners, extremely stable thanks to a special hardening process. The carabiner (8 mm thick) enables quick, easy and secure attachment.