The lock cylinder adopts a number of ant★←i-theft technologies and a v‍εariety of special-shaped anti-pullin¥&↔φg bullets to prevent technical opening. With ₹₩₹¶the unique structure design of bu±∞¶llets and blades, it has high safety perform≈₹ance of preventing technical opening. T±γ™☆he lock container is equipped with precision nΩβ​umber marble and special-shaped marble structα§★ures, which will be automatically locked when♠¥ the number marble and special-shaped marble must<™₩ be pulled at the same time during the tech∑£nical opening, thus making the te>ε₹chnical opening fail. The lock cylinder uses a☆‍ variety of special-shaped marbles a♣‌≤↕nd multiple combination✘✘s, which can compile up to b€γ§illions of key numbers,  α‌thus realizing zero-opening ofσ$  regions (one in 16 million). Th 'e lock cylinder is added©♦∑∞ with a side-to-side↔★¥ pressure-type side ✘ post locking pin device, whi®γ★←ch greatly improves the ability to prevent violen¥↑☆t torsion.

Anti-theft standard
The security level of anti-theft locks ©±is divided into A, B and C levels according toγ' national standards.
1. Class A lock cylinder, prevent techn•™εγical opening ≥ 1 minute, anti-‌​×drilling ≥ 10 minutes, anti-sawing ≥ 5≠$ minutes, anti-prying ≥ 10 minutes,≠• anti-pulling ≥ 10 minut¥↑¥☆es, anti-impact ≥ 10 minutes.
2. Class B lock cylinder, preventing ★®φ§technical opening ≥ 5 mi"¥nutes, anti-drilling ≥ 15 minutes, aσ €♥nti-sawing ≥ 5 minutes, anti-pδ≠∏rying ≥ 15 minutes, anti-pulling ≥ 15 ★∑δ∞minutes, and anti-impact ≥ 15 minutes.
3. Class C lock cylinder, prevent®σing technical opening ≥ 1¶≥0 minutes, anti-drilling ≥ 30 min₽‌utes, anti-sawing ≥ 30 minutes, an±♣♥∞ti-prying ≥ 30 minutes, anti-pulling ≥ σε&♥30 minutes, and anti-impact ≥ 30 minut¶♥&es.

Classification
Class A: The key is fl ←δat or crescent, with a row ∏λ'λof concave keyway on one side or bo ×th sides or a convex¶σ♠ keyway on four side←©s of the cross;
Class B: The key is flat or  δcrescent, with two rows of concave keyholes or≤× cylindrical multi-point concave keyholβ​₹es on one or both sides;
Class C: The key is flat, with two rows o♥✔f concave and S-shaped keyway on one or both s​Ωides, or double snake keyway inside and o₽∞utside;

Purchase Standard
The safest lock cylind♦♦®er has been upgraded to Class B and Class C. It©≤σ 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 the number δ ≠©of key teeth. It mainly depends on the s αtructure of the lock ±₽'cylinder. The blade side colum£€n structure is often much bette¥βr than the traditional m ↑βarbles structure. When p♦ε £icking a lock, it is better to ask a profess↔€€ional teacher for advi±δ‍ce and then pick it a<↔×ccording to the situation.
The second move: pick the lock and we♠↕¥igh two, one than the weight and two∏γ to look at the lock cylind♥★‍er. The heavier the weight, the better th 'e quality of the lock cylinder, and t↔♦>he more beads in the lock β←±®cylinder, the better♣‍ the anti-theft function.
The third trick: choose the loσ≈&ck cylinder to see the colo'←"r, and compare the color to see the wor≥÷∑kmanship. The good quality lock cylinder a♠'dopts electroplating treatment, the surface∏≈β↕ is smooth and the color is bright. Am∏≠α'ong them, the dark yellow color is  ☆​÷copper core, which is relatively strong an€​d has good anti-theft performance. Th♥∏∏e lock core is dim in col✔¥or and zinc alloy is gray and has bubbles. T✔≠he anti-theft performance is general.
The fourth trick: The anti-theft performanc®π₹$e of the key is poor when the key is inserte✘♦™d into the lock cylinder. After the key i∞$s half inserted, use 5 to 7 c✔δ≥omponent force to rotate c≤™lockwise or counterclocσβ§kwise and continue to press the key into the lo→ £§ck port. The stuck key indic♠↕&ates that the lock cylinder has a≈♦×✔nti-theft performance. Poor, smoothly insertin∑>¥g the lock cylinder in a half-♣↓rotation state indicates that the ant♥α♠i-theft effect is good.