High-quality Metal Material: The tubular latch made of aluminum alloy + iron and high-strength spring, wear and corrosion-resistant and not easy to deform. In addition, all the accessories are ground and polished, the surface is smooth and burr-free, sturdy , durable and can upgrade your door's security and long-term use. 45° Slanted Lock Cylinder Design: This tubular mortice latch is designed with a 45° beveled lock cylinder. The slanted design makes the door easier to close smoothly, reduces noise and is almost silent. It is very suitable for replacing internal door latch.（Please confirm the size when purchasing） Internal Lubricant: Our tubular door latch is filled with lubricant inside, which reduces the friction between the mortice latch and the metal bracket, protects it and provides excellent anti-rust performance, smooth opening and closing of the door without getting stuck due to rust. With Self-tapping Screws: Tubular latch set is convenient and can be firmly fixed in place, preventing the door latch from falling off due to excessive closing force. Easy to install and just use a screwdriver to remove the damaged interior door latch and replace with our new mortice latch. Complete Tubular Latch 45mm Replacement Set: This tubular mortice latch set comes with 5 mortice latches, 5 latch baffles and 20 screws to meet all your interior door lock cylinder installation and replacement needs, perfect for bedrooms, kitchens, bathrooms , Study etc.