This product is an emergency release lock made of solid materials. It is safe and durable, designed to serve for a long time without being easily damaged. It provides added convenience and a comfortable user experience.Features - Color: As shown - Material: Steel wire, metal - Size: 5.50 x 5.50 x 4.00 cm / 2.16 x 2.16 x 1.57 in - Allows manual opening of the garage door during power failure or opener malfunction - Universally compatible with most garage door opener brands - Constructed from die-cast materials with brushed steel wire and metal for durability - Suitable for use in banks, hotels, stores, schools, homes, malls, and other locations - Simple installation and easy to use for both beginners and professionals, ensuring stable and orderly operation Packing List 1 x Quick release lock 2 x Keys