Magnetism: High-strength pull keeps door sely closed, to strong winds and sudden forces Spr: Built-in strong spr ensures quiet operation and prolongs service life Material: 304 stainless steel with thick texture, corrosion , , and not easily deformed Installation: Two options - screw mount with invisible screw holes or adhesive sticker for easy punch-free setup Design: Thin 5mm thickness for ground installation, does not obstruct door movement or cause tripp, easy to clean Broad utilization: ground door stopper can be applied on most smooth surfaces, suitable for any apartment, school or office, heavy door, glass door, balcony door or window sash and more., Manufacturer: KXCVBNKLJ