The lock cylinder adopts a num¶≥∑×ber of anti-theft te₽αchnologies and a variety of special-shaped anti ♣∑-pulling bullets to preveα✘↓☆nt technical opening. With the uni€≥ 'que structure design of‍'×α bullets and blades, it‌™ has high safety perfoβ&​γrmance of preventing technical openin←≥∏"g. The lock containe∑λ&≈r is equipped with precision number marble anσ♦€₹d special-shaped marble structures, which will§→÷ be automatically locked when the number marγ​ble and special-shape<¶↑d marble must be pulled at the same tim₩∑♠αe during the technical opening, thα≥us making the technical opening fai↕→¥l. The lock cylinder uses a variety ®¥of special-shaped marbles and ↕←multiple combinations, which can compile up to bε÷illions of key numbers, thus realizing zero-o♥®∞↑pening of regions (one in 16 m®¥​"illion). The lock cylinder is added wiφ✘←™th a side-to-side pressure-type side post lo×₩cking pin device, which greatly improves ≥↔σ≥the ability to prevent violent torsion.

Anti-theft standard
The security level of anti-theft ¶ locks is divided into A, B and C levelsβ± according to national standards.
1. Class A lock cylinε der, prevent technical ope"γning ≥ 1 minute, anti-drilling ≥ λ&10 minutes, anti-sawing ≥ 5 minutes, anti-pr↑&×ying ≥ 10 minutes, ant∑✘i-pulling ≥ 10 minutes, anti-impact ≥ 10 min✔♣★&utes.
2. Class B lock cylinder, preve∑¶nting technical opening επ≥ 5 minutes, anti-drilling ≥ 15 minutes,≠β anti-sawing ≥ 5 minutes, anti-pry£ •§ing ≥ 15 minutes, anti-pulling ≥ 15 mi≥  •nutes, and anti-impact ≥ 15 minutes" ≠★.
3. Class C lock cylinder, pre•£venting technical opening ↑φ↔β≥ 10 minutes, anti-drilling ≥ 30 minutes, an$→ti-sawing ≥ 30 minutes, anti-prying♣× ≥ 30 minutes, anti-pulling ≥ 30 minuσ‌ £tes, and anti-impact ≥ ₩↓30 minutes.

Classification
Class A: The key is flat or crescentεΩ, with a row of concave ‌∑™≤keyway on one side or both sides or ♠>a convex keyway on four sides of the cros✘∞♦εs;
Class B: The key is flat or crescent, with  ÷<πtwo rows of concave keyholes or cylindrical •$multi-point concave keyholes on one or both sides∞•≈;
Class C: The key is flat, with twσλ₹o rows of concave and S-shape§≥d keyway on one or both sides,↓  or double snake keyway ↓≥♦εinside and outside;

Purchase Standard
The safest lock cylinder has be✘≈en upgraded to Class B and Cla ∑δ₹ss C. It is best to choose Class C when purch£±asing.
The first move: I used toγ÷σ' buy a lock to judge the quality of the lock cy→¶<<linder by the number of key teeth.&∑ It mainly depends on the struct♦"ure of the lock cylinder. The‌<£✔ blade side column structure is often♣€÷φ much better than the traditional marbles≠∞ $ structure. When picking a lock, it i÷×​s better to ask a professional☆β teacher for advice and thσ×®£en pick it according to the sit ↕α©uation.
The second move: pick the lock andβ‌ weigh two, one than the weight and two $γto look at the lock cylinder. The heavier the$®≠ weight, the better the quality of ✔↔♣the lock cylinder, and the more beads in §¥&the lock cylinder, the b¥÷¥♣etter the anti-theft functi∞ ↑♥on.
The third trick: choose the lock cylinder↓§→♥ to see the color, and compare ≈¥the color to see the workmanship. The δ★∑βgood quality lock cyσ§§linder adopts electroplating treatmen€α♣t, the surface is smooth and the color is b∏ε✘right. Among them, the dark yellow color is c$§↕opper core, which is relativeσ¶♥ly strong and has good anti-theft perform≥γ→ance. The lock core is dim in color a↔§nd zinc alloy is gray and has bubbleσφ§s. The anti-theft perfor$×↔mance is general.
The fourth trick: The anti-theft performancγ×ε$e of the key is poor when the key✘±×φ is inserted into the lock cylinder. Af±♠ter the key is half inserted, use 5 to 7 compo©£βnent force to rotate clockwise or counterclockw ¥>ise and continue to press the key into th&®e lock port. The stuck key indicates that the loc¶♥k cylinder has anti-theft★©♣$ performance. Poor, smooλβthly inserting the loc¶↓β k cylinder in a half-rotation state indi£$÷φcates that the anti-theft ef®β←fect is good.