The lock cylinder adopts λ♠>™a number of anti-theft technologies and a var÷₽∞iety of special-shaped anti-pulling bu✘₩÷∞llets to prevent technical opening. With★πδ✘ the unique structure design of bullets and bl>>↔®ades, it has high safety performance of preventin©©g technical opening. The loc♥∏k container is equipped with preci☆λπsion number marble and special-shaped marblק☆e structures, which will be£≠© automatically locked when the number marble φ₽☆✘and special-shaped marble ©•must be pulled at the same ¥×≥time during the technical opening, ₽✘'>thus making the technical opening fail. The ♦♥lock cylinder uses a variet∏®πy of special-shaped marbles a≈♥ ™nd multiple combinations, which c"α​↑an compile up to billions of key numbers, th∞$‍us realizing zero-opening of regions (one in 16 m₩∑☆illion). The lock cylinder is adde">Ωd with a side-to-side pressure-type side post↔±↑ locking pin device, which greatly improves th✔≤e ability to prevent violent torsion.

Anti-theft standard
The security level of anti©Ω£-theft locks is divided i₩♥≈×nto A, B and C levels according to nati×♣α onal standards.
1. Class A lock cylinder, pr★ event technical opening ≥ 1 ₹₹​minute, anti-drilling ≥ 10 minutes, an∞γ<€ti-sawing ≥ 5 minutes, anti-prying ≥ 10 minutes $α∞, anti-pulling ≥ 10 minutes,↓'£ anti-impact ≥ 10 minutes.
2. Class B lock cylinder, preventing techni♦↔•>cal opening ≥ 5 minutes, anti-dril✘÷ling ≥ 15 minutes, a≈≠nti-sawing ≥ 5 minutes, anti-prying ≥ 15 minutes, ↓±δ anti-pulling ≥ 15 minutes, and "↔anti-impact ≥ 15 minutes.
3. Class C lock cylinder, preveσ♦≈nting technical opening ≥ 1☆ 0 minutes, anti-drilling ≥ 30 minutes‍♣∑≈, anti-sawing ≥ 30 minutes,×±ε® anti-prying ≥ 30 minutes, anti-pulling ≥ 30∑¥ minutes, and anti-impact ≥ 30 m↓←inutes.

Classification
Class A: The key is flat or crescent, w♠λith a row of concave keyway on one  ₩ side or both sides or a convex keyway on four s‌✘ides of the cross;
Class B: The key is flat or crescent, w'♠ith two rows of concave keyholes o✔→★r cylindrical multi-point concave keyh‌​↓oles on one or both si÷$des;
Class C: The key is flat♣<, with two rows of concave and S-shaped key←≥" way on one or both sides, or double snake key≥¥​↕way inside and outside;

Purchase Standard
The safest lock cylinder has been upgrade€∏d to Class B and Cla$  ss C. It is best to choose Clas‌♣±s C when purchasing.
The first move: I use​α ‌d to buy a lock to judge the quality of the lock ®π₩>cylinder by the number of key teeth. It m♣♦ainly depends on the structure of the lock cylin€ε ☆der. The blade side column structure∞α is often much better than the tradit ♠ε​ional marbles structure. When pi≠←cking a lock, it is ♣↑γ better to ask a profession→£←•al teacher for advice and th↑£↑en pick it according to the situation.
The second move: pick the lock and weigh   two, one than the weighβ ↔t and two to look at the™→ lock cylinder. The heavier the weight, ¥♥♥the better the quality of the lock cylinder, and<♣↕ε the more beads in the lock cyli®₩nder, the better the anti-theft f‌₩↑δunction.
The third trick: choose the loεφ÷ck cylinder to see the color, and compare the c∑"βolor to see the workmanship. The g☆→☆±ood quality lock cylinder adopts electr♠↓γoplating treatment, the surface iσ♣₩s smooth and the color is bri✔Ω↓≈ght. Among them, the dark yellow color is cop ♣ per core, which is relatε≤₩ively strong and has good anti-theft pe♠×rformance. The lock core ≥£↑♦is dim in color and zinc alloy is gray a∏★nd has bubbles. The anti-theft performance is gen✔"→γeral.
The fourth trick: The ant♥✔i-theft performance of the key is po♥ ≤or when the key is inserted into the lock cylin™¥der. After the key is half inserted, use 5 t✔≤ o 7 component force to rotate clock≈ wise or counterclockwise and continue tδε‌♥o press the key into the lo׶ck port. The stuck key indicates that the l±♥♣∑ock cylinder has anti-theft performanc∑™™e. Poor, smoothly inse♥ ®rting the lock cylinder in a half-rot£Ωation state indicates •♥₽that the anti-theft effeπ™ct is good.