General description The 2X Invisible / Hook Door Lock is designed for various types of doors including framed glass, sliding, aluminum, metal, and wooden doors. This heavy-duty lock features an alloy body and a copper cylinder, ensuring durability and security. The model number is Hook999, and it comes in a sleek silver finish. Technical specifications Material: Alloy Color: Silver Model Number: Hook999 Finish: Electroplating Measurement allowed error: +/- 1-3 cm Package Contents 2 * Double-sided lock hook (with key)