Specifications: Emergency lock installation instructions: This product is suitable for all kinds of door panels, thickness of 25MM---45MM, steel wire 1.8 meters long, garage door. Disassembly before installation: 1., in the door from the ground 70CM---120CM drill a diameter of 2.4CM round hole, door panel to the outside of the circular hole relative place do two 4MM * 5MM anti groove. 2. hold the tail of the wire rope, wear the entry board from the outside, and press the lock on the entry board. 3. press the two nuts through the wire rope and screw them on the lock one by one. 4. finally, the wire rope is connected to the power failure control of the control motor This product adopts the copper lock core, the marble cipher is close, the mutual opening rate is very low: 1. open the package. 2. untie the wire rope. 3. screw nut. Garage door emergency lock Size : Lock 5 cm length, 2.2 cm in diameter Material: zinc alloy base , cover plate,steel pipe,hose . Surface treatment : bright chrome plating. Suitable for garage door, door Package contains 1X lock 2X key Shipping: Please ensure your delivery address is correct. Items will be shipped within 48 hours after payment is received / cleared (except weekends and holidays). Contact Us If you have any questions please ask me. I will reply within 24 hours. In the rare event that you have a problem with your item we strongly recommend contacting us before leaving negative or neutral feedback. We will be happy to help with your problem.