The lock cylinder adopts Ω©a number of anti-theft technologies and&‌ a variety of special-shaped anti-pullingπ♠∞ bullets to prevent techniφ÷×cal opening. With the unique struct§♥ ure design of bullets and blades, it has hig∞π± h safety performance of preventing♦∞§‍ technical opening. The lock c¶÷¥ontainer is equipped with ₹£ ©precision number marble and special-shaped marble<♠$ structures, which will be au♦✔tomatically locked when th> e number marble and spe∑®cial-shaped marble must beσ₩₩♠ pulled at the same t‌♥¶ime during the technical openin∏✔→g, thus making the technical opening fail.÷₽  The lock cylinder uses γ∑‍a variety of special-€★shaped marbles and multiple co↓←mbinations, which can co₹α∑mpile up to billions of key num≠<€©bers, thus realizing zero-opening of r↑™₽egions (one in 16 million). The loγ¶✔ck cylinder is added w©φ™ith a side-to-side pressure-type side post loc™₹←>king pin device, which greatly improves t±÷ "he ability to preven₽εt violent torsion.

Anti-theft standard
The security level of anti-theft locks σ± ☆is divided into A, B and C level₹≈γ's according to national standards.
1. Class A lock cylinder, pr×≤‍¥event technical opening ≥ 1 minute, an"✘↓ ti-drilling ≥ 10 minutes, anti-sawing ≥₽≈ 5 minutes, anti-prying ≥ 10 minutes, a®☆∞×nti-pulling ≥ 10 minutes, anti-impact ≥ 10 min×≤utes.
2. Class B lock cylinder, preventing technical o↓ "¥pening ≥ 5 minutes, anti-drilling ≥ 15  ∑∑§minutes, anti-sawing ≥ 5 minutes‌∏", anti-prying ≥ 15 minut≥δes, anti-pulling ≥ 1βε↑5 minutes, and anti-impaφ♦ct ≥ 15 minutes.
3. Class C lock cylin™↔♥₩der, preventing technical opening ≥ 10 mφ& inutes, anti-drilling ≥ 30©∏↕₽ minutes, anti-sawing ≥ 30 σ§ ♥minutes, anti-prying ≥ 30 minutes₽♠×±, anti-pulling ≥ 30 minut® ±es, and anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or € £∑crescent, with a row of concave∞λ₩ keyway on one side or both sides or a♠γ convex keyway on fou¶♦Ωλr sides of the cross;
Class B: The key is flat or crescent, wit÷ ¶h two rows of concave keyholes or cylin©&≈drical multi-point concave keyholes on₩∏ one or both sides;
Class C: The key is flat, with two rows ∏σ÷of concave and S-shaped keyway on one or both s&$ides, or double snake keyway÷€§ inside and outside;

Purchase Standard
The safest lock cylinder has been upgra←®εded to Class B and Class C. It is best to₽δ choose Class C when purchasing.
The first move: I used to buy a l✘<♣≥ock to judge the quality$α of the lock cylinder by the num$εber of key teeth. It mainly depends §♣↓on the structure of the l♣♣ock cylinder. The blad←π÷§e side column structure is often much better tha¶"n the traditional marbles structure. ₹™‌When picking a lock, it is be‌ φ£tter to ask a profes‍σ∑sional teacher for advice a¶δ∑nd then pick it according to the sitσσ"uation.
The second move: pick the lock and weigh t♥££ wo, one than the weight and two to look at the lo€•₽φck cylinder. The heavier the weight, th✘®™←e better the quality €♥✘of the lock cylinder, and the more beads in the¶₽≈ lock cylinder, the ∑‌ ♣better the anti-theft func ≠♦tion.
The third trick: choose the lock cylin≈₩σder to see the color, and compare the colo>↕×r to see the workmanship. The gλαood quality lock cyliπ'♦ nder adopts electroplating treatment, the suα₹←rface is smooth and theα≠‍ color is bright. Among them, the dark yellow ←​γcolor is copper core, which is relatively s≈©→trong and has good anti-theft performanσ∑∞ce. The lock core is dim in co≥☆±lor and zinc alloy is gray and has bubbles.≠λ The anti-theft performance is general.
The fourth trick: The an™λ↕§ti-theft performance of the key is poor when₩∏γ the key is inserted into the lock cyl♥​$inder. After the key is half₹∞×↓ inserted, use 5 to 7 c​→"εomponent force to rotβ¶σate clockwise or counterclock☆¥βwise and continue to press the kφπ₽ey into the lock port. The stuck key indicates thβ♦∑↓at the lock cylinder ha•® s anti-theft performance. Poor, smβ‌≤oothly inserting the <≤lock cylinder in a half-rotation state indicate∑π ₩s that the anti-theft effect i∏∑★αs good.