BR-612B Double Cylinder Dead Lock, Square Tongue Aluminum Swing Door Lock with Carbon Steel & Aluminum Construction

BR-612B double cylinder swing door lock is precision manufactured with premium carbon steel, aluminum alloy and copper internal components, providing robust structural strength, wear resistance and long service life for daily door operation. It adopts a double-sided key cylinder design, enabling key locking and unlocking from both interior and exterior sides of the door for flexible access control and improved space security. The lock body undergoes anodizing and electroplating surface processes, which effectively boost corrosion and rust resistance, maintaining a clean metallic finish even in humid or outdoor environments. Its square tongue deadbolt mechanism delivers solid, firm latching and strong anti-prying performance, making it ideal for securing aluminum swing doors including entry doors, interior security doors and commercial swing door systems. As the square-tongue counterpart to the hook-tongue BR-612 model, it fits standard aluminum swing door profiles seamlessly. This lock is widely applied in residential and commercial aluminum door projects, supporting bulk wholesale orders and OEM customization services.