1. This ensures smooth rotation of the cylinder wrench while blocking access to the impact keys. 2. We offer locking cylinders in various sizes. You can choose between double and button lock cylinders to meet different installation needs and enhance home security. 3. When inserting the key, the rotation is smooth without jamming, making it easy to open and close the lock cylinder. 4. Nickel cylinder locks are compatible with various doors, including wooden, composite, metal, interior, front doors, and most doors with keyholes. 5. The product is durable and easy to install, making it ideal for most households. 6. It features a competitive , fit, and an appearance that meets your lock cylinder requirements. 7. Enhanced door safety allows you to enjoy better security without costly handle upgrades or additional safety devices. 8. The key door lock has a unique anti collision and anti pin trapping function, ensuring smooth key rotation while preventing impact key input.