The lock cylinder adoα∏γpts a number of anti-theft technologies and ​∞≥a variety of special-shap₹÷ed anti-pulling bullets to prevent technical ope∞∏βφning. With the uniqu¥π∑©e structure design of bullets and blades, it has ₽∑δ®high safety performance §₩of preventing technical opening. T®©he lock container is equipped wi→✘<th precision number marble and special->±÷ shaped marble structures, whicδ↓h will be automatically lock★<ed when the number marble and special-s∞φ♦λhaped marble must be "€∑≈pulled at the same time during→±£ the technical opening, ε☆§thus making the technical opening fail. The lock♣¥₩ cylinder uses a variety of special-shaped mar↔φ£bles and multiple combinations, whic÷ h can compile up to billions of key numbers, ↑©♥εthus realizing zero-opening of regions (one in✔♣Ω✔ 16 million). The lock cylinder is ad‌§ded with a side-to-side pressure-type®≠ side post locking pin device, which greatly im✔↑proves the ability to prevent v÷₹iolent torsion.

Anti-theft standard
The security level of anti-theft locks is divide♦₹d into A, B and C levels according to≈£π national standards.
1. Class A lock cylinder, p≈&revent technical opening ≥ 1 minut‌'₹e, anti-drilling ≥ 10 minutes, anti-sawin±'♥€g ≥ 5 minutes, anti-prying ≥ 10 minutes♦απ$, anti-pulling ≥ 10 minutes, anti-i↕<mpact ≥ 10 minutes.
2. Class B lock cylinder, preventing technicalδγ opening ≥ 5 minutes, anti-drilling ≥ 1€♣5 minutes, anti-sawing ≥ 5↕✔¶Ω minutes, anti-prying ≥ 15 minutes, anti-pull&λ₩ing ≥ 15 minutes, and anti-impact ≥&> 15 minutes.
3. Class C lock cylinder, preventing t↓♦φechnical opening ≥ 10 minutes, anti-drilliσ♥ng ≥ 30 minutes, anti-sawing ≥ 30 minutes, '€↑anti-prying ≥ 30 minu©®δtes, anti-pulling ≥ 30 minutes, and ant>φΩ♠i-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cresc≤∏ent, with a row of concave keyway on one sideφ™ or both sides or a conv¥®÷ex keyway on four sides of the cross;
Class B: The key is flat or crescent, with tw£ λ>o rows of concave keyholes or cσ₽♦​ylindrical multi-point concave ∑↔π>keyholes on one or both sides;
Class C: The key is flat, w≥÷ ith two rows of concave and S-shaped keyway≈≤☆& on one or both sides, or double snake key‌♣way inside and outside;≠↑

Purchase Standard
The safest lock cylinder has been upgraded to β÷Class B and Class C. It←λ✘ is best to choose Class C when purcε$ hasing.
The first move: I used ±§to buy a lock to judge the quali∞Ωπσty of the lock cylinder by the number o♥±σ±f key teeth. It mainly de✘<pends on the structure o'£↑ f the lock cylinder. Th♣× e blade side column structure is ©φλαoften much better than the tra €ditional marbles structure.↓×←↑ When picking a lock, it is be™‌tter to ask a professional teacher for "‍ advice and then pick it ac≤ cording to the situation.
The second move: pick the lock and weigh two, on£∑  e than the weight and two to look at the lock <βφcylinder. The heavier the weight, the better the↕✔☆ quality of the lock cylinder, a<∞δ≤nd the more beads in the lock cylinder, the b↑&etter the anti-theft function.
The third trick: cho≥↑σose the lock cylinde₹£∑r to see the color, an₩δd compare the color to see the workmanship.₽× The good quality lock cylinder adopts e≈ ¥σlectroplating treatment,↔>± the surface is smoot♠ h and the color is bright. Among them&≠'&, the dark yellow color is copper core, which i‌≈s relatively strong and has goα↑πod anti-theft performance. The lock core is dim i±α♣n color and zinc alloy is φ gray and has bubbles. The anti-theft perf¥€₩ormance is general.
The fourth trick: The anti-th™&πeft performance of the key is poor when the key∑€×γ is inserted into the lock cylinder. A↕♦fter the key is half inserted, usΩ✔'e 5 to 7 component force to rotate clockwise or ≈♥♦counterclockwise and continue to prλδ→↓ess the key into the lock port. The s¥ & tuck key indicates that the lock cylinde✘ ✘©r has anti-theft performanc←★e. Poor, smoothly insert​&ing the lock cylinder in a half-rot€♦↕ation state indicates that the anti-theft eff<‌ect is good.