The lock cylinder adopts₹γ←♦ a number of anti-theft technol★≈‍ogies and a variety of special-shaped anti-pull≤>•λing bullets to prevent te±Ωchnical opening. With the unique structur ​♥e design of bullets and bl∏σλades, it has high safety performanc​♠₹e of preventing technical opening. The lock con™​tainer is equipped with precision number marbleΩε and special-shaped marble structures, which  φ‌σwill be automatically locked when the£  number marble and speci‌¶÷al-shaped marble must be pulled at the✘★©α same time during the technical opening, th≤∑↔us making the technical ope'✔≤∞ning fail. The lock cylinder uses a variety of£≈γ special-shaped marbles and muε ltiple combinations, which can compile u™®p to billions of key numbers, thus γ∑realizing zero-opening of regions &₩δ(one in 16 million). T βhe lock cylinder is added wi∞φ<th a side-to-side pressure-type si←∞↓πde post locking pin device, which greatly improve₽β™✔s the ability to pre₩₽"vent violent torsion.

Anti-theft standard
The security level of ant₩≤§i-theft locks is divide‍‍&d into A, B and C leve ₹↔ls according to national standards.
1. Class A lock cylinder, preven♥±♠t technical opening ≥ 1 minute, anti-d"‌‍rilling ≥ 10 minutes, anti-sawing ≥ 5 minutes,÷σ anti-prying ≥ 10 minutes, an">ti-pulling ≥ 10 minutes, anti-impact ≥ 1© ×0 minutes.
2. Class B lock cylind↕✘€er, preventing technical ≠¥♥♥opening ≥ 5 minutes, anti-drilling ≥ 15 minute§∑s, anti-sawing ≥ 5 minutes, anti-pryi¥ ✔ ng ≥ 15 minutes, anti-pulling ≥ 15 ×↕✔÷minutes, and anti-impact  ∞ "≥ 15 minutes.
3. Class C lock cylinder, prev★αγenting technical openin₩β≈g ≥ 10 minutes, anti-drilling ≥ 30 minutes, a™☆÷nti-sawing ≥ 30 minutesδ♦∑, anti-prying ≥ 30 minuteα  s, anti-pulling ≥ 30 minutes, andγε™₽ anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or crescent§↓‍→, with a row of concaveσλ$ keyway on one side or both sides or δ∞a convex keyway on four sides of the crosγπ s;
Class B: The key is flat or creβ↔≠‍scent, with two rows of concave↑∏' keyholes or cylindric∏™$al multi-point concave keyholes o™✔n one or both sides;
Class C: The key is flat, with₹↓♣α two rows of concave and ¶₩S-shaped keyway on one or both sides, £¶♦or double snake keyway inside andλ€γ✘ outside;

Purchase Standard
The safest lock cylinder ha↕¶₽s been upgraded to Class B and C∞↔lass C. It is best to choose C&<€lass C when purchasi∏ →ng.
The first move: I used to≤ ₽ buy a lock to judge the÷₩π§ quality of the lock cyli∑§nder by the number of k≥δey teeth. It mainly depends on the strΩ☆ucture of the lock cylinde¶♥®♣r. The blade side column st≤​β&ructure is often much better than the tradi÷γ‍≥tional marbles structure. When picking a✔  lock, it is better to ask × ✘​a professional teache<÷¥r for advice and then pick it accord‍​ing to the situation.
The second move: pick the lock and weigh tw§"↑o, one than the weight and two to look at the l∞£™ock cylinder. The heavier the weight, the be÷"‌αtter the quality of t↕‌he lock cylinder, and the more bead"♦α"s in the lock cylinder, the↔  better the anti-theft function.
The third trick: choose t™ε he lock cylinder to see the color, and compare th∞¥₽★e color to see the workmanship. The good qua×​♦♣lity lock cylinder adopts≠‍← electroplating treatment, the surface is smoothΩ±§ and the color is bright. Amon↓ ✘g them, the dark yellow ↑$¥color is copper core, which α is relatively strong and has good ✘→anti-theft performance∞±. The lock core is dim'< in color and zinc alloy is gray and has b∏≤≠ubbles. The anti-theft performance is general.
The fourth trick: The anti-theft performan×♦α ce of the key is poo€σ♣↓r when the key is inserted into the loc☆ k cylinder. After the key is half inserted, "&use 5 to 7 component force to rotate clock←☆wise or counterclockwise and contin™Ω₩ue to press the key iλΩnto the lock port. The stuck keΩπ≠y indicates that the lock cylinder has←±♥β anti-theft performance. Poor, smo↑&©othly inserting the lock cylinder i$×≠n a half-rotation state ​≤≠indicates that the anti-theft ¶​effect is good.