The lock cylinder adopts a number of anti-thef€ ±←t technologies and a vari←​☆ety of special-shaped anti-pulling bull★×≤​ets to prevent technical openingδ £. With the unique structure de$<↓₹sign of bullets and blades, it has hφαigh safety performance of preventing technical o←♠pening. The lock container is equipped with  ©↑precision number marble a<÷↓∏nd special-shaped marble st✔γructures, which will be automatically locke"'≤d when the number marble and special-♠₩♠shaped marble must be pulled at the same tim≥±e during the technical opeλ‌≤↕ning, thus making the technical opening f×®ail. The lock cylinde€₹↔r uses a variety of special-shape¶↓€d marbles and multipl✘&e combinations, which ¥←πcan compile up to billio"×← ns of key numbers, thus realizing zero-opening ♣↕ &of regions (one in 16 million). The l♠<™ ock cylinder is added ♥∑with a side-to-side pressure-type side  £♠post locking pin device, which greatly impro ¶¥§ves the ability to prevent viol‌♦ent torsion.

Anti-theft standard
The security level of an↑±≠÷ti-theft locks is divided int‌♠♦o A, B and C levels according to national standa​€rds.
1. Class A lock cylinder, prevent tec← hnical opening ≥ 1 minute, ©<anti-drilling ≥ 10 minutes, anti-sawing ≥ Ω✔ 5 minutes, anti-prying ≥ 10 minutes, ant< ≤i-pulling ≥ 10 minutes, anti-impact ≥ 10 minutes€§•.
2. Class B lock cylinder, preventing technical↓✘λ  opening ≥ 5 minutes,π≥ anti-drilling ≥ 15 minutes, anti-sawing ₹↕≥ 5 minutes, anti-prying ≥ 15 minut↑→↔♣es, anti-pulling ≥ 15 minutes, and ant →‌i-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing techn$λ≤ical opening ≥ 10 minutes, anti-d→£€↓rilling ≥ 30 minutes, anti≤÷-sawing ≥ 30 minutes, anti-prying ≥ 30 minuα♥tes, anti-pulling ≥ 30 minutes, and≤&® anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cresce£±nt, with a row of concave keyway on one∏π side or both sides or a convex keε<&yway on four sides of the cε€ross;
Class B: The key is flat ₹§≈or crescent, with two rows of concave keyhole≥↓λs or cylindrical multi-point ∏ concave keyholes on one or both sides;
Class C: The key is flat, with two rows of cδ ☆↔oncave and S-shaped keyway on one or bo±>&th sides, or double snake keyway inside and outsi↕αde;

Purchase Standard
The safest lock cylinder ☆≠€$has been upgraded to Class B and Class C."™₹ It is best to choose Class C when purchasin ✔∑g.
The first move: I used to ₽≤buy a lock to judge the quality ∞λ♠of the lock cylinder byΩ¥φ the number of key teeth. It mainly depends on t÷>δhe structure of the lock cyl÷↔<inder. The blade side column structure is∞​σ♣ often much better than the traditional mar₽★bles structure. When picking a loc★¥λk, it is better to ask a profe↕₹ ssional teacher for advice β‍±¥and then pick it acc™‌ording to the situation.
The second move: pick the lock and weigh ₩λ∞two, one than the weight and two to look at the ♥♦lock cylinder. The heavier th±±¥e weight, the better the quality of® ₩ the lock cylinder, and the more beads in the '÷ε"lock cylinder, the betteσ≠r the anti-theft function.
The third trick: choose the lock cyli®•δσnder to see the color, and compare  ₹©the color to see the workmanship. The goo✔✔ d quality lock cylinder adop☆π✘♣ts electroplating treatment, the surface <↓§is smooth and the color is bright. Amo₩↕÷≈ng them, the dark yel£$ ←low color is copper core, which is relat∑&ively strong and has♦↕∏★ good anti-theft performance. The lock core €★↕>is dim in color and zinc alloy is gray ↕¶and has bubbles. The an✘σφαti-theft performance is general.
The fourth trick: The anti§≤☆-theft performance of δ€ the key is poor when the key is inserted into t↓<♣∞he lock cylinder. After the key is half i∞£∑σnserted, use 5 to 7 ©→component force to rot♦¶δate clockwise or counter§εclockwise and continue to pres₩✘πs the key into the lock port. The stuck key indic☆α↕ates that the lock cylinder has anti-™¶theft performance. Poor,✘‌ smoothly inserting the lock ₩€cylinder in a half-ro‌♣Ωtation state indicates that∏λ₹ the anti-theft effect is good.