Engineered with a precision door lock gearbox for smooth and reliable operation of your lock cylinder and latch mechanism. High-strength zinc alloy door lock gearbox ensures long-lasting durability and resists wear from frequent use. This door lock gearbox fits most standard cylindrical door locks, Precisely machined components within the door lock gearbox allow for straightforward replacement and hassle-free DIY installation. A dependable door lock gearbox provides consistent performance, ensuring your door locks engage securely every time for peace of mind., Manufacturer: LKfjnhePF