What Makes a Security Door Safest?

1. Check the Performance and Structure of the Lock

- Choose a drill-resistant lock cylinder.

- The lock should have a three-point locking mechanism.

- For single doors, there should be three hinges; for double doors, six hinges.

- Consider adding additional deadbolts between the door leaf and the frame.

2. Consider the Number of Locks and Bolts

- Opt for a door with two locks, each controlling two bolts. 

3. Assess the Thickness and Area of Reinforcement Plates

- The protective plate for the lock should be made of cold-rolled steel with a thickness exceeding 2 millimeters.

- The height of the protective plate should not be less than 500 millimeters.

- For enclosed security doors, other parts should have cold-rolled steel with a thickness of at least 1.5 millimeters.

4. Evaluate the Quality of Craftsmanship

- Material selection is essential, but the quality of craftsmanship is crucial.

- Pay particular attention to checking for any welding defects.

5. Consider the Material and Security Grade of the Security Door

- Most security doors on the market are made of steel, but there are also options in stainless steel, copper, steel-wood structures, and aluminum alloy.

- Security doors are graded as A, B, C, or D. For residential use, C and D grades are commonly preferred as they offer higher security performance.

- According to national standards, security doors should have a permanent fixed marking on the inner side at the top corner of the hinge, at a height of 1600mm ± 100mm from the ground.

6. Select Based on Exterior Design

- Security doors are available in luxury, mid-range, and standard categories. Choose according to personal preferences and requirements.

7. Examine the Lock Cylinder

- The lock cylinder is a crucial consideration for security doors.

- Security door lock cylinders have three levels, with B-level lock cylinders being commonly used for household security. However, for maximum security, consider using lock cylinders beyond the B-level, which even professional locksmiths find difficult to open, ensuring enhanced safety for your home environment.