Various specifications: We provide different sizes of lock cylinders, you can choose double or knob lock cylinders to meet your different installation needs and protect your home security. High security: Our lock cylinder has a variety of stable security functions, the lock cylinder and key made of solid pure copper have the functions of anti-picking, anti-drilling, anti-slamming, anti-shock and also fireproof. Quick installation: We have provided the corresponding accessories, you can quickly remove the old lock cylinder and replace it with our high-quality Euro lock cylinder. Smooth use: When you insert the key to start using, the rotation will be smooth and there will be no jamming, which is convenient for opening and closing the lock cylinder. Wide range of adaptation: The lock cylinder can be adapted to the most types of doors, including wooden doors, metal doors, UPVC doors, interior doors, entrance doors, and most doors with keyholes. -Advantages- High Security: Our lock