The lock cylinder adopts a number of anti-t≈ heft technologies and a va✘¶≠αriety of special-shaped anti-pulling bullets to >π∑≠prevent technical opening. With the uniq₹¥ue structure design of bullets anεΩ®d blades, it has high safety perforπ​&≠mance of preventing technical β©λopening. The lock container≥↑∏ is equipped with precision n¶≈♠±umber marble and special-shaped marble str‍™™uctures, which will be automatically locked whα‌€↑en the number marble an★'★÷d special-shaped marble mu>€βst be pulled at the same time during the te§←chnical opening, thus making the technical™ε←¥ opening fail. The lock c ¥ylinder uses a variety of special-shaped marbles ¥÷π<and multiple combinations, which can compil→×φe up to billions of key numbers, thus rea± ♠lizing zero-opening of regions (one in 16 milli©&↕"on). The lock cylinder is added with a side-to-si™'∑de pressure-type side post locking ‍☆←αpin device, which greatly improves the ab←✔™ ility to prevent violent tors$←αδion.

Anti-theft standard
The security level of anti-theft locks i↔×‍s divided into A, B ↓♠and C levels according to national standards.
1. Class A lock cylinder, prevent technical β×‍opening ≥ 1 minute, anti-drilling ≥ 10 mi≤ <nutes, anti-sawing ≥ 5 minutes, anti-prying↓"ε ≥ 10 minutes, anti-pulling ≥ 10 minute'₹÷‍s, anti-impact ≥ 10 minutes.
2. Class B lock cylind✔♦"σer, preventing technical opening ≥ 5 mi≤"♥nutes, anti-drilling ≥ 15 minutes, anti-sε≈awing ≥ 5 minutes, anti-prying ≥ 15 minutes, ∏  anti-pulling ≥ 15 minutes, and anti≠•-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing t→ ®‍echnical opening ≥ 10 minutes, ant>​☆i-drilling ≥ 30 minutes, anti-sawing ↔≤≥ 30 minutes, anti-prying ≥ 30 minutes, anti-≈β≥pulling ≥ 30 minutes, and anti-impact ≥ 30 minut♦¶es.

Classification
Class A: The key is flat or crescent, with © a row of concave keywaα™y on one side or both sides or a >₹convex keyway on four sides of ≈®&≤the cross;
Class B: The key is flat or ☆γ€crescent, with two rows of concave keyholes orε↑☆ cylindrical multi-point concave keyh×‍↕≈oles on one or both sides;
Class C: The key is flat, with two  ←✔§rows of concave and S-shapσ​®ed keyway on one or both sides, or double snake φ♦keyway inside and outside;

Purchase Standard
The safest lock cylinder has been upgra✔≠ded to Class B and Class C. It is best to ∞∞"choose Class C when purcha≠∏©βsing.
The first move: I used to b €♦uy a lock to judge the quality oβ£f the lock cylinder by the number o₩σ←f key teeth. It mainly ✘↑ depends on the structure of the lock λδ₽cylinder. The blade side column structσ♠ure is often much better than  ¶₩↓the traditional marbles structure. When picλ§king a lock, it is better to ask a prσ§ofessional teacher for δ¶advice and then pick it according to the ™‍‍situation.
The second move: pick the lock an↓÷d weigh two, one than the weight and two to lα♠←‌ook at the lock cylinder. The h‌×&eavier the weight, the beσπ"‌tter the quality of the lock cy≠↔≤↓linder, and the more beads in the £πlock cylinder, the bet≥α$ter the anti-theft function.
The third trick: choose the l♦±↓ock cylinder to see the color, and compε↑♠are the color to see the work∞↑manship. The good quality loc ₩"k cylinder adopts electroplaλ€ting treatment, the surf→ ace is smooth and the color is bri✔δght. Among them, the dark yellow color is •≠₽σcopper core, which is relatively stronδ​αg and has good anti-t¥$εheft performance. The lock core is dim in←₹™ color and zinc alloy is gray and has π≥bubbles. The anti-thef <₽"t performance is general.
The fourth trick: The anti-theft performan∞÷ce of the key is poor when the ✘↑key is inserted into the lock cylinder$<≠δ. After the key is half inserted, use 5 to ★Ω≈♦7 component force to rotate clockwise or ↑™↓counterclockwise and continue ¥♥₽↑to press the key into the lock ‍ port. The stuck key indicates φ₹∏←that the lock cylinder has anti-theft performanc₹$&€e. Poor, smoothly inserting the lock cylind"‌er in a half-rotation sta"δ​∞te indicates that the anti-theft & ≥↔effect is good.