The lock cylinder adopts a number of anti✔‍‍'-theft technologies and a ≈♦σvariety of special-shaped anti-pulli↕α↔ng bullets to prevent techni®♠←​cal opening. With the  σπunique structure design of bullets and <♦ blades, it has high safety performance of prevent€<₽♣ing technical openin£™γg. The lock container is equipped with precisio₽πβ≤n number marble and special-shaped marbleו≈× structures, which will be automa₽>÷‍tically locked when the number marble÷&→∞ and special-shaped marble must be pulled at↕​$ the same time during the technical opening, th∏≠≤us making the technical oσ<'pening fail. The lock c®≥<≈ylinder uses a variety of ‍♦☆∑special-shaped marbles and §​✘ multiple combinations, which can compile up t₹φ÷←o billions of key numbers, thus real★♥♠izing zero-opening of regions (one i ± ÷n 16 million). The loc÷∏>k cylinder is added with a side-to-sid₩​₹e pressure-type side post lockπ€ing pin device, which great₹♣ly improves the abili‍₽≈&ty to prevent violent torsion.

Anti-theft standard
The security level of anti-γ ↕™theft locks is divide"★d into A, B and C levels accordinσ£★g to national standards.
1. Class A lock cylinder, ‍ prevent technical openα ₽ing ≥ 1 minute, anti-drillin≈•↔g ≥ 10 minutes, anti-sawing ≥ 5 minutes, anti•×£-prying ≥ 10 minutes, anti-pulling ≥"α  10 minutes, anti-impact ≥ 1​¥Ω0 minutes.
2. Class B lock cylinderπφ ‍, preventing technical opening ≥ 5 minutes, ≠←anti-drilling ≥ 15 minutesλ₩δ, anti-sawing ≥ 5 minutes, anti-pryi₩>ng ≥ 15 minutes, anti-pulling ≥ 15 minutes, and a£♦¥nti-impact ≥ 15 minutes.
3. Class C lock cylinde♦&→r, preventing technical opening₩↕§ ≥ 10 minutes, anti-drilling ≥ 30 minute¥±∏↓s, anti-sawing ≥ 30 mε$•‍inutes, anti-prying ≥ 30 minuβ¥✔tes, anti-pulling ≥ 30 minute​εα×s, and anti-impact ≥ επ30 minutes.

Classification
Class A: The key is flat o©®​'r crescent, with a row of concave keyway on o♣÷€±ne side or both sides or a conv>←ex keyway on four sides of the cross;
Class B: The key is flat o‌‍≤r crescent, with two ±£♥rows of concave keyholes or€π cylindrical multi-point concave keyholes on ®∞×'one or both sides;
Class C: The key is fΩ∞★lat, with two rows of concave and S-shaped keσ₩÷yway on one or both sides, or do​∞​uble snake keyway inside and outside;

Purchase Standard
The safest lock cylinder has been upgrad∏↔✘©ed to Class B and Class C. It is best ↑↓≠to choose Class C when purchasing.
The first move: I used to bu←≥↔•y a lock to judge the quaβ→ lity of the lock cylinder by the number of key t♥≈φeeth. It mainly depends on the structure of t ∏he lock cylinder. The bΩ→≈lade side column structure is ofte​ n much better than th•"e traditional marbles structuλσre. When picking a lock, it is better to ask a ₹'₹professional teacher for advice and then pick→→ it according to the s←λ↓∞ituation.
The second move: pick the lock and weigh two, γφ♥one than the weight <★and two to look at the lo¥<✘ck cylinder. The heavier theβ&☆≠ weight, the better the quality of the lock cyβ↔εlinder, and the more beads in the lock cylinder, ₽ ↔÷the better the anti-theft functiλ•☆£on.
The third trick: choose the lock cylinder to ₽£• see the color, and compare∏βπ" the color to see the workmanship. The good quγ'≥₩ality lock cylinder adopts electroplatin"♥g treatment, the surfaceλ β  is smooth and the color is bright. Amβ¥ong them, the dark yellow color is¶<"≈ copper core, which is relati÷<₽vely strong and has good λα anti-theft performance. The lock core i ε s dim in color and zinc alloΩγ↔∏y is gray and has bubbles. The anti-theft perfor♠®€mance is general.
The fourth trick: The anti-theft ™←αperformance of the k"¶ey is poor when the key is inserted in∑♦to the lock cylinder. Af±<∏ter the key is half inserted, use 5 to 7 componen♠®t force to rotate clockwi$‌₹☆se or counterclockwise and cont≤★inue to press the key ¶→into the lock port. The stuck key indica♥→tes that the lock cylinder©↔φ‌ has anti-theft performance. Poor, smoothl♦≈×y inserting the lock cylinder i€>n a half-rotation state indica ‌₩tes that the anti-theft effect is good↔®.