The lock cylinder adopts a >βnumber of anti-theft$¶∞₩ technologies and a variety of special-shaped an¥→ Ωti-pulling bullets to prev↔ ent technical opening. With the unique structure ‌Ω <design of bullets and blade↔π∞s, it has high safety performance of preventing t<♠echnical opening. The lock container is ☆↑≠₹equipped with precision number marble and sp÷​ecial-shaped marble structures,←$ which will be automatically locked £ when the number marble and sp€φ•ecial-shaped marble must be pulled →✘≠δat the same time during the technical opening≠$↕∑, thus making the technical opening fail. The lo₽•ck cylinder uses a variety of special-shapedφσ marbles and multiple combinations, whβ↑®¶ich can compile up to billions of →✘key numbers, thus realizing zeroφγ₽-opening of regions (one in 16 million)≠€$→. The lock cylinder is added♦☆γ∑ with a side-to-side •∞±≠pressure-type side p↕​♦ost locking pin device, which greatly impro‍∞ves the ability to prevent vio★'βlent torsion.

Anti-theft standard
The security level of anti-theft locks is d$Ωivided into A, B and C levels accor$☆ding to national standards.
1. Class A lock cylinder, prevent technic←×÷al opening ≥ 1 minute, anti-drill♥™σing ≥ 10 minutes, anti-s₹✔α♦awing ≥ 5 minutes, an☆€ti-prying ≥ 10 minutes&¥•", anti-pulling ≥ 10 minutes, anti-impact ≥ 10∏♣ minutes.
2. Class B lock cylinder, p∞‍₽γreventing technical opening ≥ 5 minutes, ant★ i-drilling ≥ 15 minutes, anti-sawing ≥ 5 minutes★'™₩, anti-prying ≥ 15 minutes, anti-Ω≠™pulling ≥ 15 minutes, and anti-↑Ω¥impact ≥ 15 minutes.
3. Class C lock cylinder, pr∏®₩eventing technical openin✘♥g ≥ 10 minutes, anti-drilling ≥ 30 minutes, ‍​ anti-sawing ≥ 30 min'§utes, anti-prying ≥ 30 minutes, anti-pulling ≥ ​>30 minutes, and anti-impact ≥ 30 minute→β≠s.

Classification
Class A: The key is flat±'≠∞ or crescent, with a row of concave key§≥way on one side or both sides or a convex k•§∑φeyway on four sides of the cro​™₹ss;
Class B: The key is flat or cresce ♦ εnt, with two rows of conc↕α€ave keyholes or cyli☆• λndrical multi-point concave keyholes on↕♠→ one or both sides;
Class C: The key is flat, ★©with two rows of concave and S-shaped®  keyway on one or both sides, or dou↓₽≠ble snake keyway inside and outside;

Purchase Standard
The safest lock cylinder has b§↓Ω'een upgraded to Class B and Class C.€↑ It is best to choose Class C when purchσ→asing.
The first move: I used to buy a lock to j✔π&udge the quality of the lock cylinder by the n↔←umber of key teeth. It mai≠ε∞nly depends on the struct↕£‌ure of the lock cylinder. The≥‌ε blade side column st♣∑×✘ructure is often much b←λetter than the traditional marbles structur≥↕e. When picking a lock, it is better to ask & ∞a professional teacher for advic∏λe and then pick it according to the s®♦ituation.
The second move: pick the lock and $•weigh two, one than the weigγ€ht and two to look at the lock cylinder. The hea β©‍vier the weight, the better the quality of theλ©♦♦ lock cylinder, and the more beads i$​♦✔n the lock cylinder, the better th✘£₽e anti-theft function.
The third trick: choose the lock cylinder to sδ$≠ee the color, and compare the color t₽♣≈↓o see the workmanship. The σ€♦↕good quality lock cylinder adopts electropla'®& ting treatment, the surface is smooth and the> ₽→ color is bright. Among the∏€✘m, the dark yellow color is copper core, whi≤∏≠ ch is relatively strong and >>>has good anti-theft p¶∞erformance. The lock core is dim i'∑¥ n color and zinc alloy is gray and has bubbles☆€. The anti-theft performance is g₹λαeneral.
The fourth trick: The ©&∑≠anti-theft performance←ε of the key is poor when the key is  π♠λinserted into the lo™÷£&ck cylinder. After the key is half inserted, use ☆↑←5 to 7 component force to rλ★otate clockwise or counterclockwise and con♥♣®tinue to press the key in♥&to the lock port. The stuck key indicate♣∑↕♠s that the lock cylinder has anti-theft perform₩↓ance. Poor, smoothly inserting ↔ αthe lock cylinder in ש♠✘a half-rotation state indicates that the antiσΩ-theft effect is good.