The lock cylinder adopts a number of anti-thef♣₹t technologies and a variety o¶★©f special-shaped anti-pulling bullets♣π to prevent technical op♦β>ening. With the unique struc↕> γture design of bullets and blades, it has h↕ ±igh safety performance of preventing technicaλ★δl opening. The lock container is equipped with pr★× ←ecision number marble and special-shape>γεd marble structures, which will be automatλ>♦ically locked when the nu§☆ mber marble and special-shaped marble must b ←e pulled at the same time during the tec♠÷ ♦hnical opening, thus making th" e technical opening fail. The lock cylinder u‍σses a variety of special-shaped marbles >&and multiple combinations, which c< ✘¶an compile up to billions of key •↓♦numbers, thus realizing zero-openinα↕g of regions (one in 16 million). The lock cyαβ¶linder is added with a side-to-side pressur±α€←e-type side post locking p★∑×✔in device, which greatly ∏​∏×improves the ability to prevent violent torsion.

Anti-theft standard
The security level oπ↕>f anti-theft locks is divided into A§₩, B and C levels according to nat♦$ional standards.
1. Class A lock cylinder, ≤€☆‌prevent technical opening ≥ 1 minute, anti-drillδ← ing ≥ 10 minutes, anti-£®sawing ≥ 5 minutes, anti-prying "α≥ 10 minutes, anti-pulling ≥ 10 minutes, anti-im•☆pact ≥ 10 minutes.
2. Class B lock cylinder, preventing te∏"≤×chnical opening ≥ 5 minutes∑$∑, anti-drilling ≥ 15 minutes, anti-sawing ≥ 5 ≤απ minutes, anti-prying ≥ 15 minutes ≠♠ , anti-pulling ≥ 15 minutes, and anti-im♥ pact ≥ 15 minutes.
3. Class C lock cylinder, prγ>σeventing technical opening ≥ 10 minutes, an§β★<ti-drilling ≥ 30 minutes, antγ∞♦i-sawing ≥ 30 minutes, anti-prying ≥ 30 min↕&utes, anti-pulling ≥ 30 minutes, and§↓¥β anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or crescent<≥​♦, with a row of concave k∏≤eyway on one side or∑₹♦★ both sides or a convex keyway on Ωδ₹four sides of the cross;
Class B: The key is flat or crescent, with two‌•β‍ rows of concave keyholes α©or cylindrical multi-point concave ←π✔≠keyholes on one or bo∞£₽th sides;
Class C: The key is flat, w׶& ith two rows of concave a✔≈€‌nd S-shaped keyway o 'n one or both sides, or doub♣≠σ☆le snake keyway inside and outsidλ•<e;

Purchase Standard
The safest lock cylinder has been <σupgraded to Class B and Class C. It is∏γ∞ best to choose Class C when☆✔ & purchasing.
The first move: I used to bu→ ♥'y a lock to judge the quality of the lo☆±$ck cylinder by the number o₹σ •f key teeth. It mainly depends$$÷ on the structure of the lock cy↔€β→linder. The blade side column structure is often ♠↕÷much better than the traditional marbles structu₩₩εre. When picking a lock, it is bett≥→✘er to ask a professional ¥✔teacher for advice and thλδ≥en pick it according to the situation.
The second move: pick the lock and weighσ₹★ two, one than the weight and two to¥>± look at the lock cylinder. The→ε☆ heavier the weight, the better the quality ofπ₩φ the lock cylinder, and the more beads in the lo↕∏ ≈ck cylinder, the better the a∞¶•nti-theft function.
The third trick: choose the lockε←↔< cylinder to see the color, and co✔'mpare the color to see the workmans≥↕hip. The good quality lock cylinder ad♠‌>opts electroplating treatment, the surface is smoα★☆oth and the color is bright. Among them§₽, the dark yellow color is π✔copper core, which is relat'λ&ively strong and has good ant₹‌i-theft performance. The ✔​≠>lock core is dim in color and zinc γ≤​®alloy is gray and has bubα☆Ωbles. The anti-theft performance is general.
The fourth trick: The anti-theft'♠α​ performance of the key is poor when t♥→σ∑he key is inserted into the lock cylind↔↕er. After the key is hal>↓• f inserted, use 5 to 7 component force≤↓∞ to rotate clockwise or counterclockwise an©£d continue to press the key into the lock port£π. The stuck key indicates that the ​ lock cylinder has anti-theft performa≤'☆nce. Poor, smoothly in✘ serting the lock cylinder in a ha$♣✔lf-rotation state indicat ​∞±es that the anti-thefΩ★✔ t effect is good.