The lock cylinder adopts a number oβ♦≤f anti-theft technologies and a vari•↓ ety of special-shaped anti-pulling bullets ♠≥to prevent technical opening. With the unique ≥‌∑ structure design of bullets and blades>∏ , it has high safety performance ☆​≠of preventing technical opening. The lock c♣×ontainer is equipped ☆ with precision number marble and special-shaped≠' ♦ marble structures, which will be automδ><"atically locked when the ™±‌number marble and special-shaped marble must b™π'e pulled at the same time ★¶÷during the technical opening, thus ma≈≤king the technical opening fail. The lock c←¥↓βylinder uses a variety of special-sh"☆₩aped marbles and multiple combinations, ★ which can compile up to billi>≥ons of key numbers, thus≠' realizing zero-openingα♦¶< of regions (one in 16 million). Thβ​e lock cylinder is added with a sid$∑e-to-side pressure-type side βγ÷post locking pin device, which great₽₹ly improves the ability to prevent violent torαΩ¥sion.

Anti-theft standard
The security level of anti-the‌↔≠ft locks is divided into A, B and γ₩₩≥C levels according to national standards.
1. Class A lock cylinder, prevent techniλ↓✘cal opening ≥ 1 minute, anti-drilling ≥ 10∑π₩↔ minutes, anti-sawing ≥ 5 minutes, anti-prying ≥β≈π₩ 10 minutes, anti-pulling ≥ 10 mi¶≥nutes, anti-impact ≥ 10 §♣↑'minutes.
2. Class B lock cylinder, preventing¥'&¥ technical opening ≥ 5 minutes, anti-drill®♠π®ing ≥ 15 minutes, anti-sawing ≥ 5 miγ♣β¥nutes, anti-prying ≥ 15 minutes, anti-pullin♦™€☆g ≥ 15 minutes, and anti-i€≈≥mpact ≥ 15 minutes.
3. Class C lock cylinder, preventing tech↔♦nical opening ≥ 10 m"←☆≥inutes, anti-drilling ≥ 30 minutes, anti-sawing ≥α÷↔ 30 minutes, anti-pry∞₽♠ing ≥ 30 minutes, anti-pulling ≥φ‌φ 30 minutes, and anti-impact ≥ 3₽φ↑0 minutes.

Classification
Class A: The key is flat or cres ∞×cent, with a row of concave keyway o★★®±n one side or both sides or ±₽✔​a convex keyway on four λ©← sides of the cross;
Class B: The key is flat or cres¶∏•cent, with two rows of concave keyholes‍≤δ§ or cylindrical multi-point™→ concave keyholes on o≤<$ne or both sides;
Class C: The key is flat, with two r₩&εows of concave and S-sha★ §πped keyway on one or both s™'ides, or double snake keyway inγ​£side and outside;

Purchase Standard
The safest lock cylin•↓der has been upgraded to↓ ∏ Class B and Class C. It is best to c☆✔Ωδhoose Class C when purchasing.
The first move: I used to buy a '₹‌lock to judge the quality of the lock &©♦cylinder by the number of key teeth. εε♣ It mainly depends o÷®σ™n the structure of t​&he lock cylinder. The blade side col€ umn structure is often much↑λ better than the traditional m‍δ÷±arbles structure. When picking a lock, it is bet∑§ter to ask a profess&ππ♣ional teacher for advice and then pick it acco₹↑rding to the situation.
The second move: pick the lo♠™‍ck and weigh two, one↕✔ than the weight and two to look at the lo"₽ck cylinder. The heavier the weig↔​€>ht, the better the quali∑Ω™$ty of the lock cylin₽₹$•der, and the more beads in the lock cylinder,<"‍¥ the better the anti-theft function.
The third trick: choose tφ≠↕he lock cylinder to see the colo✔∏£σr, and compare the color to γ¥≠see the workmanship. T↑πσ​he good quality lock cylinde$∞∑÷r adopts electroplati₹β€ng treatment, the surface is smooth and↓€ the color is bright. Amo×±±±ng them, the dark yellow color ©α×is copper core, which is relativel♠£↑y strong and has good anti-theft per☆©§•formance. The lock core σ ♦ is dim in color and z♦∏↕¶inc alloy is gray and has bubbles. The anti-the ₹₹φft performance is general.
The fourth trick: The Ω™anti-theft performance of the key is poor when th×&'e key is inserted into the lock cylinder. A ∑•&fter the key is half inserted, use 5 to 7  → component force to rotate clockw§αΩise or counterclockwise and continue to pres<≥×s the key into the lock p© "ort. The stuck key indicates that the lock cylinβ der has anti-theft performan♥<•¶ce. Poor, smoothly inserting t♥✘he lock cylinder in a ¶ε∏half-rotation state indicates that'§​ the anti-theft effect is₽÷ good.