The lock cylinder adopts a number of anti-×✘±↑theft technologies and a variety σ of special-shaped anti-pull∑&£±ing bullets to prevent techni©₹cal opening. With the unique structure design®>  of bullets and blades, it has high safety perfΩ"‌>ormance of preventing technical opening. The ™ lock container is equipped with precision n↕♥‍≥umber marble and special-shaped marble structur×★es, which will be automatically ↔÷β€locked when the number marble and special-shapφ€‍Ωed marble must be pulled at the ≤π∏®same time during the technical openi₹πng, thus making the technical ope←α→ ning fail. The lock cylinder uses a variety ♣ ↓™of special-shaped marbles and multiple combi¶₩¥♣nations, which can compi λle up to billions of key numbers, thus realizing$<÷÷ zero-opening of regions (one in 16 million). Thγ​≥∏e lock cylinder is added with a sidΩ&α↑e-to-side pressure-type side post locking pin ₹' ​device, which greatly improves the ability to↓•δ prevent violent torsion.

Anti-theft standard
The security level of anti↔σ↕-theft locks is divided into A,λ¥✘ B and C levels accordin₹← g to national standards.
1. Class A lock cylinder, p¥ ≤revent technical opening ≥ ₩Ω1 minute, anti-drilling ≥ 10 minutes, ant¶✘i-sawing ≥ 5 minutes, anti-prying ≥ 10 minut<¶ $es, anti-pulling ≥ 10 minutes, anti-impact ≥ 10 m"•→™inutes.
2. Class B lock cylinder, preventing → technical opening ≥ 5 minutes, anti-drillin↑™₹↓g ≥ 15 minutes, anti-sawing ≥ 5 ≈♥minutes, anti-prying ≥ 15 minu♣♣tes, anti-pulling ≥ 15 minutes★≤®, and anti-impact ≥ 15 m§‍inutes.
3. Class C lock cylinder, preventing t¥βechnical opening ≥ 10 miα™•nutes, anti-drilling ≥ 30 m₹≥δ±inutes, anti-sawing ≥ 3φγ¥0 minutes, anti-prying ≥ 30 minutes, an© ‌ti-pulling ≥ 30 minutes, and anti-impact<♦'$ ≥ 30 minutes.

Classification
Class A: The key is flat or cres•‌αcent, with a row of conca​ ©βve keyway on one side★§©♦ or both sides or a convex keyway o₩♠∏n four sides of the c™±ross;
Class B: The key is flat or crescent, wit§©☆ h two rows of concave keyholes or cylindrical mul  ti-point concave keyholes on one or both side↓★'₩s;
Class C: The key is flat, with €λtwo rows of concave and S-shaped keyway on o♦∞Ω​ne or both sides, or double snake≠©¶‍ keyway inside and outside;

Purchase Standard
The safest lock cylinder has been upg♦πraded to Class B and Class C. It is best to cλ☆φ¶hoose Class C when purchasing.
The first move: I used to buy a lock to judgΩ ∑e the quality of the lock cylinder by the©↓✘β number of key teeth. It"♣≥ mainly depends on the struc¶↔↑★ture of the lock cylinder. The blade side c‌÷∏olumn structure is often much&✘® better than the traditional marbles structur"ε∏↑e. When picking a lock, it is better to ask a p••©rofessional teacher for adv♣×γ✔ice and then pick it according t•↕≠o the situation.
The second move: pick the lock and weigh two, £✘®§one than the weight and two to look at ↑♦→‌the lock cylinder. The heavier the we ♠ight, the better the quality of the locλ≈÷πk cylinder, and the more beads in t€&φhe lock cylinder, the better the ≤β±£anti-theft function.
The third trick: choose t δhe lock cylinder to see the color, and compa≤±re the color to see the workmansh ↔ip. The good quality lock cylinder adopts ele↕≠Ω£ctroplating treatment, the surface is smooth a≤' γnd the color is bright. Among them, ‌ the dark yellow color is copper core, which ‍ is relatively strong and has good anti-theft peφ§βrformance. The lock core is dim in color and z∑♦inc alloy is gray and‌₹↔ has bubbles. The anti-tδ±heft performance is general.
The fourth trick: The anti-the₹שft performance of the key is poor when the ke β☆y is inserted into the lock ¥♣>cylinder. After the key is half inserted, ✘≥use 5 to 7 component force to rotate clock¥$♦≠wise or counterclockwise and continue to ¥✘☆•press the key into the lock port.×♠↓ The stuck key indicates that the loγ‌ck cylinder has anti-theft ‍↑↕₽performance. Poor, s¥☆☆moothly inserting the lock↔β cylinder in a half-rotation state indicates that₹♥ the anti-theft effect is good.™‌λδ