Feature:1. Aluminum Material: 6 pin cylinder using aluminum alloy material, which is environmentally protective and proof.2. Combined Use: Can be used in conjunction with a notched locking device for a safety door, providing double security.3. Core Principle: Adopts the principle of multi directional lock core and uses a variety of mechanical structures to prevent the almighty key to unlock.4. Effective Performance: Has anti theft function, can effectively improve the reliability and security of locks, is your first choice for safety.5. and Convenient: Has passed 100,000 loop test, and the core will come with 3 keys and 1 fixing screw, convenient for users.How to Use:How to measure your lock:Remove the fixing screw which is located on the main door gear just beneath the door lock.Put the key in the lock and turn it 25 degrees clockwise or anti clockwise.The lock should now slide out towards you.Take a ruler or tape measure and measure from the centre of the fixing screw to the outside . This is size (A)Now measure from the centre of the fixing hole to the other side of the cylinder. This is size (B)Now to measure size (C), measure the entire length of the lock. This should be equal to (A) and (B) added together.Specification:Item Type: Cylinder LockMaterial: Aluminium AlloyApplication: