Profile: S. G. Industries is involved in the field of producing automatic door closing devices and builders hardware fittings. Our products include hydraulic door closer, pneumatic door closer, hydraulic floor spring, coil door spring, helical door closer, magnet door holder, arrow door spring, glass shelf holder and corner shelf holder. Our flat door springs are used to provide strong suspension to doors and are accurately designed and perfectly coated with anti rust chemicals to ensure smooth opening and closing of doors.