The lock cylinder adopts a number of anti-thef​≤t technologies and a variety of♣✔≠> special-shaped anti​£-pulling bullets to prevent technica★"↑l opening. With the unique structure design♦"∑₹ of bullets and blades, it has high÷£☆ safety performance of preventing techniα÷×cal opening. The lock container is e∑©∏∑quipped with precision number marble and speciλ↕≥al-shaped marble structur♣÷‍'es, which will be automatically locked♠✘ when the number marbl™Ω ≠e and special-shaped marble must b£×$e pulled at the same time during the techni&↔¥♥cal opening, thus makπ×ing the technical opening fΩ¥↕≤ail. The lock cylinder uses a variety of speci∏♣≤al-shaped marbles and multiple comb÷§±inations, which can compile©₹♥ up to billions of key numbers,  ₹thus realizing zero-opening of regions (one iπ♠®∞n 16 million). The lock cylinder is added with a±π side-to-side pressure-type side post locking≈≤ pin device, which greatly improves the ability ☆λ≈to prevent violent torsion.

Anti-theft standard
The security level of anti-the≤★βft locks is divided into A, B and C leve±≠ls according to national standards.
1. Class A lock cylinder, prevent techn♣σ∑ical opening ≥ 1 minut÷₽∞₹e, anti-drilling ≥ 10 m$¶γinutes, anti-sawing ≥ 5 minutes, anti-prying ε>≥ 10 minutes, anti-pulling ≥ 10 minutes₩®≈₩, anti-impact ≥ 10 minutes.
2. Class B lock cyliΩφαnder, preventing technical opening ≥ 5 minutes,  ↑∞αanti-drilling ≥ 15 minutes, ant $'i-sawing ≥ 5 minutes, anti- ✘ δprying ≥ 15 minutes, anti-pulling ≥ 15 minutes, a♦↓± nd anti-impact ≥ 15 minutes.
3. Class C lock cylinder, p$•σ↕reventing technical opα↔•ening ≥ 10 minutes, anti-drilling ≥ 30 m≤ inutes, anti-sawing ≥ 30‍σ€↔ minutes, anti-prying ≥ ​≈30 minutes, anti-pulli₩>ng ≥ 30 minutes, and anti-impact ≥ 30 minutes≤ε.

Classification
Class A: The key is flat or crescent, wi ↕≥th a row of concave keyway∞ ' on one side or both sides λ or a convex keyway on four sides of th₹←e cross;
Class B: The key is flat o↓"r crescent, with two rows of concave key₽↕≈✔holes or cylindrical multi-point conca☆λ®ve keyholes on one or both sides;
Class C: The key is flat, with two rows of ∏‌®concave and S-shaped ke♦ ‌yway on one or both sides, or double snake keywa→₹y inside and outside;

Purchase Standard
The safest lock cylinder has been upgraded to C©$<$lass B and Class C. It is best to ch®∞<↔oose Class C when purchasing.
The first move: I used to buy a $™lock to judge the quality ofβλ$ε the lock cylinder by ↓✔£the number of key teeth. It mainly depends "™‍on the structure of the lock cylinder. The blade&αλ≠ side column structure is often mu↓ ∑©ch better than the traditional marbles structurε<↓e. When picking a lock, it is better to ask a ≤Ω✔professional teacher for advice and th♦σen pick it according to the sit•¶αuation.
The second move: pick the lock and weigh two, o↑↕‍ne than the weight and two to look at λ₩βthe lock cylinder. The h ♦eavier the weight, the better the qu©¥ality of the lock cylindβ→₽er, and the more beads✔α in the lock cylinder, the better the anti-theft<σ function.
The third trick: choose the lock c ≥ylinder to see the color, and compare the δ<color to see the workmanship. The go™§βod quality lock cylinder adopts el♦​™¥ectroplating treatment, the surface is smoot δh and the color is bright. A∑∞₩☆mong them, the dark yellow colo£★↓↑r is copper core, which<≠&← is relatively strong a•≠‍¥nd has good anti-theft performance. Theαα♥↕ lock core is dim in‍€✘ color and zinc alloy is gray and ha≤¥s bubbles. The anti-the✔δft performance is general.
The fourth trick: Theπ  ↓ anti-theft performance of th★ e key is poor when the key is inserte↕ ☆×d into the lock cylinder. α↕✘•After the key is half inserted★≠‍≠, use 5 to 7 component forcε‌β>e to rotate clockwise or cou§≤÷€nterclockwise and continue to ∑<δ©press the key into the lock port. The stuck k←★★≈ey indicates that the loc¥✘k cylinder has anti-theft performa‍δnce. Poor, smoothly inserting ♥★≠‍the lock cylinder in a☆™$ half-rotation state indicates that the £€anti-theft effect is go¥<σod.