1. This ensures that while blocking the impact of the key from entering, the rotation of the lock cylinder is very smooth. 2. We offer lock cylinders in different sizes. You can choose doublelock or button lock cylinders to meet different installation requirements and ensure home security. 3. When inserting and using the key, it rotates evenly without jamming, facilitating the operation of the lock cylinder for locking and unlocking. 4. The nickelplated lock cylinder is suitable for various door types, including wooden doors, composite doors, metal doors, interior doors, front doors, and most doors with keyholes. 5. If you have any questions about the product, please feel to contact us. We will do our to provide you with a satisfactory reply within 24 hours! 6. It has antipry, antidrill, and anticollision functions, providing you with a safe and reliable home security guarantee. 7. Adopting a unique anticollision technology with trap pins, it ensures that the lock cylinder rotates extremely smoothly while blocking the impact of the key from entering. 8. It can enhance security without the need for expensive handle upgrades or additional security devices, improving the antitheft performance and usability of the lock cylinder. 9. These door locks are suitable for all door types, including wooden doors, metal doors, patio door locks, French doors, and composite doors.