The lock cylinder adopt​β₩£s a number of anti-theft t'​♠echnologies and a variety of special-sha÷÷ped anti-pulling bullets to prevent techn™<  ical opening. With the unique structure deγ♣sign of bullets and blades, it has high safety☆> performance of preventing techni•φ≤cal opening. The lock co∏γ∑ntainer is equipped with precision n★£umber marble and special-shaped marble str✘ ∏uctures, which will be auto€‌σ‌matically locked when the number m↕≤εarble and special-shaped marble mus$→t be pulled at the same time during thεΩα$e technical opening,<∑ thus making the technical openin$£g fail. The lock cylinder uses"↓ a variety of special-shaped marbles an ® ¥d multiple combinations, which can cεδompile up to billions>±Ω‌ of key numbers, thus realizing zero-openiβ>≤​ng of regions (one in 16 m$γ£ illion). The lock cylinde¥​αΩr is added with a side-to-side pre₹≤∑ssure-type side post locking pin↔∞ device, which greatly impro>≤ves the ability to p<↑revent violent torsion.

Anti-theft standard
The security level o₹×f anti-theft locks is divided into A÷♥$Ω, B and C levels according to national stanλ​•dards.
1. Class A lock cylinder,  ±$βprevent technical opening ≥ 1 minute, anti-dr♠←​ illing ≥ 10 minutes, anti-sawi¶£ng ≥ 5 minutes, anti-prying ≥ 10 minutes, anti-pu↕β© lling ≥ 10 minutes, anti-impact ≥ 10 minutes©±&π.
2. Class B lock cylinder, preventing technicaλ¥l opening ≥ 5 minutes,®₽☆  anti-drilling ≥ 15 minutes,↓≈ anti-sawing ≥ 5 minutes, anti-prying ≥ 15 minut ↑‌es, anti-pulling ≥ 15 minutes, and anti-±>∑impact ≥ 15 minutes.
3. Class C lock cylinder, preventing technica©≈l opening ≥ 10 minutes, anti-β>♠©drilling ≥ 30 minutes, anti-s✔‍<awing ≥ 30 minutes, a>≥₩±nti-prying ≥ 30 minutes, anti-pulΩ•Ωπling ≥ 30 minutes, and anti-impact ≥ 30 m£±inutes.

Classification
Class A: The key is flat or crescent, with a r♥<ow of concave keyway on one side or both sides ¥∑ or a convex keyway on four sides of the c↓"£ross;
Class B: The key is flat or×₹≈ crescent, with two rows ±¥of concave keyholes or cyl÷'indrical multi-point∑↔"​ concave keyholes on one or both sides;
Class C: The key is fl<<at, with two rows of concave and φ S-shaped keyway on one or both sides, or  ®double snake keyway inside and out××★side;

Purchase Standard
The safest lock cylinε↑λ←der has been upgraded to∑$ Class B and Class C. It←λ₹‌ is best to choose Class C±♠‌ when purchasing.
The first move: I used to buy a lock to judge'< ♥ the quality of the lock cylinder by th≠↓→e number of key teeth. It mai™‌nly depends on the structure of ±‌the lock cylinder. The blade side column struct✘∏ure is often much better than the t$®™raditional marbles structur≠©×αe. When picking a lo∞δck, it is better to ask a profe↑&ssional teacher for advice and then pick it §‌∑according to the situation.λ₩
The second move: pic₹"♠k the lock and weigh tw±✘Ωo, one than the weight and two to l↔•ook at the lock cylinder. The heavi≤® ✔er the weight, the better the qual™‌ity of the lock cylinder, a©£nd the more beads in the lock✔™÷₽ cylinder, the better the anti-the'↑'ft function.
The third trick: choose the lock cylinder to see ≤$the color, and compare ¶$→±the color to see the λ★workmanship. The good quality lock cylinder ado≈'π✘pts electroplating t™™reatment, the surface is smooth and the color is Ω αbright. Among them, t✔>​✘he dark yellow color is σ¶∑copper core, which is relatively strong and hasδ✔αδ good anti-theft performance.≠≈♣ The lock core is dim in color and zinc alloy is  ♠ε gray and has bubbles. The anti-γφ★theft performance is general.
The fourth trick: The anti-theft per¶©≥formance of the key ÷↕☆ is poor when the key is inserted into the lock cy×​linder. After the key is half in"‌serted, use 5 to 7 component force to rota©λte clockwise or count€®♠™erclockwise and continue to press β♦•the key into the lock por≥↓t. The stuck key indicates that the lock cylα<​inder has anti-theft p α€erformance. Poor, smoothly inserting the lock cy®↔∞§linder in a half-rotation state ✔® indicates that the anti-tφ¥ ≠heft effect is good.