This product is an emergency lock. It is made of solid materials. It is safe and durable. It can be used for a long time without being easily damaged. It is an excellent emergency lock that can provide you with more convenience, allowing you to have a more comfortable experience. Features - Color: As shown - Material: Steel wire, metal - Size: 5.50X5.50X4.00cm/2.16X2.16X1.57in - This door lock allows manual opening of the garage door in case of power failure or other opening malfunction. - This garage door emergency lock is universally compatible with most brands of garage door openers. - Made of cast construction, brushed steel wire and metal for durability. - Widely used in banks, hotels, shops, schools, homes, shopping malls, etc. - Easy installation, easy to use for beginners or professionals, allows you to use it correctly and stably. Packing list 1 x quick release lock 2 x keys