Brand Name : Scimagic-RCOrigin : Mainland ChinaModel Number : SMG-LType : Garage door release lockGreat for when the power goes out Garage Door Opener keyed release will work on all doors and openersSPECIFICATION:-1 meters industrial steel connecting cable Designed to allow garage door to be operated manually- Size: 46mm (suits for all garage door panels)- The diameter of the thread: 12mm- Kit includes all mounting hardware, 1m cable + cable bolt limiter- Durable for a long trouble free life- Includes 2 keys- Complete with stainless steel plate and chrome spiral nails- Most common and cost effective solution- Provides added securityIt's als good to be prepared. This simple and effective key release ensures you have manual access to your garage at all times.-allows emergency garage door opening with key-attached to top panel of garage doorThis release lock used to disconnect garage door opener mechanism to allow opening garage door manually from the outside. Essential for use on garages that do not have any other access door to the garage to allow the garage door to be opened from the outside during power outage or operation failure. Works with any make or model of garage door opener that has a pull down release mechanism on the carriage assembly. Works with one piece overhead and sectional up and over type garage doors. This item is and includes lock mechanism with two keys, steel cable, mounting hardware.