The lock cylinder adopts a number of ★¶anti-theft technologies anש€&d a variety of special-shaped an₹÷ &ti-pulling bullets to prevent t♠φ≥echnical opening. With the uni®>÷que structure design of bul >♣lets and blades, it has high safety perγ≠¶✔formance of preventing technic≠₽al opening. The lock container→​ is equipped with precision number marble and spe γcial-shaped marble structures, which w↕∞ill be automatically locked when the number ma ÷π®rble and special-shaped marble must be pull<Ω‍ed at the same time d<↓♥'uring the technical open‌×ing, thus making the technical o'☆pening fail. The lock cylinder uses a variety€& of special-shaped marbles and multiple π​'combinations, which can compile up to billion​α' s of key numbers, thus realizin₹≠♦∑g zero-opening of regions (one in ≈ ↔≠16 million). The lock cyli®×∞nder is added with a sid♣'×e-to-side pressure-type side post loc ÷εking pin device, which greatly improves t↓βhe ability to prevent violent tπ☆orsion.

Anti-theft standard
The security level of anti-theft locks is¥£ divided into A, B andε&§← C levels according to national standards.
1. Class A lock cylinder, prevent technical openi×®§ng ≥ 1 minute, anti-dri☆€lling ≥ 10 minutes, ≤λanti-sawing ≥ 5 minutes, anti-prying ≥ 10 mφ≥‌±inutes, anti-pulling ≥ 10 minute∞₽φs, anti-impact ≥ 10 m←♦inutes.
2. Class B lock cylinder, preventing technic'✔★al opening ≥ 5 minutes, anti-drilling ≥ 1 ← ♣5 minutes, anti-sawing ≥ 5 minutes, ant &×∑i-prying ≥ 15 minutes, anti-pulling $♦ ≥ 15 minutes, and anti-impact ≥ 15 minute ₹₽♣s.
3. Class C lock cylin≤•$≥der, preventing technical opening ≥ 10 m↓✘inutes, anti-drilling↑☆"÷ ≥ 30 minutes, anti-sawing ≥ 30 minutes, an€₽₩ti-prying ≥ 30 minutes, anti-pulli<↔→ng ≥ 30 minutes, and anti-impact ≥ 30£↔≤ minutes.

Classification
Class A: The key is flat or crescent, ‍±÷with a row of concave keyway on one sid€ ★↓e or both sides or a convex keyway £$↓on four sides of the cross;✘'∞
Class B: The key is flat o‌≠≈r crescent, with two rows of concave keyh<φ♥₹oles or cylindrical multi-point concave ke<£yholes on one or both sides;
Class C: The key is fφ↓lat, with two rows of ∏♦concave and S-shaped keyway on one ​ or both sides, or double snake keyway inside and  →outside;

Purchase Standard
The safest lock cylinder has bee♦♣♣♣n upgraded to Class B and Class C. It is ₽♠best to choose Class C when  ¥♣✔purchasing.
The first move: I used ±÷to buy a lock to judg‌♥•×e the quality of the lock cylinder by theββ number of key teeth. It mainly depends onσ→₩ the structure of the lock cylinder. The bl¥✔ade side column structure is often much better β↑αδthan the traditional m‌™★§arbles structure. When picking a locφ¥♥αk, it is better to ask a professional teacher for≤&​α advice and then pick it a ₽γccording to the situation.
The second move: pick ε the lock and weigh two, one than th€£∏e weight and two to look a≥₽t the lock cylinder. The heavier the weight, th∏ γ♥e better the quality of the'©∞ lock cylinder, and the more b≥<₽•eads in the lock cylinder, the bett γ<er the anti-theft function.
The third trick: choose the loc‍•<k cylinder to see the color, and compaεαre the color to see the workmanship. The good qua€✘↑lity lock cylinder adopts elec×÷§troplating treatment φ, the surface is smooth and the color$♠ is bright. Among them, the dark±¥↕✘ yellow color is coppφ×er core, which is relatively strong and hasπ♣ good anti-theft performance.£€ ™ The lock core is dim in color and zinc all< β←oy is gray and has b¶≤α>ubbles. The anti-theft performance is genα'‍↓eral.
The fourth trick: The anti-theft ±≈>↓performance of the key is p"β£oor when the key is inserted into ☆ the lock cylinder. After ↔ →the key is half insert‌"$δed, use 5 to 7 component force to rotate c™​ lockwise or counterclockwise and cont±δ​€inue to press the key into the∑≠​♣ lock port. The stuc>±™≤k key indicates that the lock cyli₽"nder has anti-theft ∑∞₹ performance. Poor, smoothly β π≠inserting the lock cylinder in a half-rotatφ•☆φion state indicates that t↑§φ♠he anti-theft effect is good​€.