The lock cylinder adopts a number of ant₩  §i-theft technologies and a variety of sp✘™ecial-shaped anti-pulling bullets to pre☆®∑vent technical opening. With the uni•<que structure design of bullets a§♥nd blades, it has high safe←"ty performance of preventing technical opening. Tπ&×he lock container is equipped with preci£₹sion number marble and speciλ®al-shaped marble structures, which will be autom∑≤atically locked when the"★ ✔ number marble and special-shaped marb™πle must be pulled at the s♥™♦ame time during the technical opening,α↕ thus making the techn βical opening fail. The lock cylinder uses  ​λ₩a variety of special-shaped marbles and multipl☆∏×e combinations, which c∞¶an compile up to billions of key numbers, t ☆$✘hus realizing zero-opening of regions (one in 16 ₩§€¶million). The lock c≈≠ylinder is added with a side-to-‍$§<side pressure-type side post locking p↕ ‌‌in device, which greatly improves the ability to&ε" prevent violent torsion.

Anti-theft standard
The security level of anti-theft locks is divide•☆σεd into A, B and C levels according to national ™× ★standards.
1. Class A lock cylinder, preven> t technical opening ≥ 1 minute, anti-drilling ≥ &δ10 minutes, anti-sawing  ®∏≥ 5 minutes, anti-prying ≥ 10 minutes, a✔§∞®nti-pulling ≥ 10 minut∞∏ es, anti-impact ≥ 10 minutes.
2. Class B lock cylinder, prevent  ≠ing technical opening ≥ 5 minut‌"✔es, anti-drilling ≥ 15 minutes, anti-sawing εφσ≥ 5 minutes, anti-prying ≥ 15 minutes, anti-pulπ≥ling ≥ 15 minutes, and anti-impact ≥ 15 minutes. ©♦☆
3. Class C lock cylinder, preventing technical op™π✘Ωening ≥ 10 minutes, anti-drilling ≥ ≠αε 30 minutes, anti-sawing ≥ 30 minut♦λπes, anti-prying ≥ 30 minutes, anti-p©₩£βulling ≥ 30 minutes, and ant¶δi-impact ≥ 30 minutes¶ .

Classification
Class A: The key is flat or ÷$≈crescent, with a row of ‌↓concave keyway on one side or both ™§↓sides or a convex keyway§&α on four sides of the cross;≥↑ Ω
Class B: The key is flat or crescent, ®÷≥©with two rows of concave ke≤ yholes or cylindrical mul÷$£ti-point concave keyholes on one or both siγφ¥§des;
Class C: The key is flat, with two≈§¶ rows of concave and S-shaped keywa¥εy on one or both sides, or double snake keywa÷✔y inside and outside;

Purchase Standard
The safest lock cylinder has been upgraded t±©o Class B and Class C. It is best to choose Cl±♥>ass C when purchasing.
The first move: I used to buy a lock to j≠™udge the quality of the lock cylinder by thφα∑ e number of key teeth. It mainly de₩♠γ"pends on the structure of$ & the lock cylinder. The blade sid★♣→₩e column structure is often±" much better than the traditional marb÷× les structure. When picking a lock, it i♥"s better to ask a professional te‌•₹Ωacher for advice and then pick it accordi£φ±ng to the situation.
The second move: pick the lock and weigh↔​₹∏ two, one than the weigh₩∏t and two to look at the lock cyl•★inder. The heavier the weight, the ≠≥£♣better the quality of the lock cylλ inder, and the more bead≤®★✘s in the lock cylinder, the better the anti-th♦©♠eft function.
The third trick: choose the lock cylinder tσ®o see the color, and ↓Ω€¶compare the color to see the workmanship. The goo¥π<d quality lock cylinder adopts electroplatin÷≈₽g treatment, the sur™←"face is smooth and th≤αe color is bright. A©♣mong them, the dark yellow color is copper co‌βre, which is relatively str↓∏♠★ong and has good anti-theft performance. The lock>δ©Ω core is dim in color≤∏≤↓ and zinc alloy is gray and ha "s bubbles. The anti-™¶$theft performance is≤≈↕γ general.
The fourth trick: The antiφσ'-theft performance of the key is poφ&or when the key is inserted ↔↑into the lock cylinde≈± r. After the key is half inserted, use 5 t≤ o 7 component force to rotate clockwise or cou×εnterclockwise and continue to press t✔≥​₽he key into the lock poγ♣δαrt. The stuck key indicates that the ☆₹>βlock cylinder has anti-theft pe≤ ₹rformance. Poor, smoothly insert$☆ing the lock cylinder in a half-rot>↔γation state indicates that the ☆¶anti-theft effect is good.