The lock cylinder adopts a number of anti-theftβ® technologies and a variety of speci✘Ωal-shaped anti-pullin÷♣g bullets to prevent technical• δ© opening. With the unique structure design ¥αof bullets and blades, it has high safety perfπ↓ ormance of preventing tec✘∑φ∏hnical opening. The lock c‍π•♠ontainer is equipped with precision number mar✘♣ble and special-shaped marble structures, which>♣× will be automatically locked when the ♥•number marble and special-shaped marble mu₹ st be pulled at the same tim‌✘"e during the technical opening, thus maki¶÷ng the technical opening fail. The loc§✘★k cylinder uses a variety of spec¶★®ial-shaped marbles and multiple c♣✘εαombinations, which can compile up to billi≈☆₹ons of key numbers, thuσ↕♦s realizing zero-opening of regio>φ‍εns (one in 16 million). The lock cylinder isΩ↕π added with a side-to-side pressure-λ₩<φtype side post locking ×€×≥pin device, which greatly ← improves the ability to pr≤<event violent torsion.

Anti-theft standard
The security level of anti-theft locks is dividα®"φed into A, B and C levels according to n≠>'✘ational standards.
1. Class A lock cylinder, prevent technical≥£​  opening ≥ 1 minute, anti-drilling ≥ 10 minute↔&s, anti-sawing ≥ 5 minutes, a≤©¶∞nti-prying ≥ 10 minutes, anti-p↓≠ulling ≥ 10 minutes, anti-impaσ↕★εct ≥ 10 minutes.
2. Class B lock cylinder, φ₽×preventing technical opening₽★ ≥ 5 minutes, anti-drilling ≥ 15 minutes, φ±♣ anti-sawing ≥ 5 minutes, a₹​≥γnti-prying ≥ 15 minutes, anti-pulli©α±ng ≥ 15 minutes, and anti-impact☆✘φ÷ ≥ 15 minutes.
3. Class C lock cylinder, preventing technicalβσ← opening ≥ 10 minutes, anti-drilling ≥ 30 minu₩↕​tes, anti-sawing ≥ 30 minutes, anti-prying ≥ 'σ"₩30 minutes, anti-pulling ≥ 30 minutes,$↑ ∑ and anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or crescent, with<✘$≠ a row of concave ke δ♠εyway on one side or both si₹≈αdes or a convex keyway o​≥n four sides of the cross;
Class B: The key is flat or crescent, ¥₽$with two rows of concσ​€ave keyholes or cylindrical multi-point concave "★Ωkeyholes on one or both sides;
Class C: The key is fl​♥at, with two rows of concave and ✔‌S-shaped keyway on one o÷πr both sides, or double snake keyway inside and≤× outside;

Purchase Standard
The safest lock cylin∞✘¶der has been upgraded to Class B and Class C. It±≠ is best to choose Class C when purcha↔£÷↑sing.
The first move: I used&∑♠$ to buy a lock to judge the quality of the‍§ lock cylinder by the number of key t✘•π≤eeth. It mainly depends on the structure of the lφ÷®•ock cylinder. The bl↓<ade side column structure is often much bette≠÷r than the traditional marbles structure. Wh¶✔&↔en picking a lock, it is better t±δo ask a professional teacher for advice→<£ and then pick it according to the sit‌λ‌uation.
The second move: pick the lock and weigh•♠✘ two, one than the weight and two to look at★★÷÷ the lock cylinder. The heavier the €∏∞&weight, the better the qu'♠ality of the lock cylinder,π→ and the more beads in the lock cyli♠>≠≥nder, the better the anti-theft fuε™nction.
The third trick: choose the lock cylinder to see ™φγ™the color, and compare the color to ☆ see the workmanship. The good quality lock λ>≥™cylinder adopts electroplating treatmenδ±t, the surface is smooth and the col$€σor is bright. Among them, the dark yellow ±♠♦£color is copper core ∑, which is relatively$€ strong and has good anti-theft performance.λ→↕γ The lock core is dim in col♦♠or and zinc alloy is gray and ha♦<απs bubbles. The anti-theft performance λ&♦is general.
The fourth trick: The  ∑πanti-theft performance of the key ≠≠'is poor when the key is insert♠αδεed into the lock cylinder. After the k≥←✔ey is half inserted, use 5 to 7 co¶£♦mponent force to rotate clockwise o♣±​r counterclockwise and contin∞↓×ue to press the key into the loc♠πk port. The stuck key indicates that ÷€≠the lock cylinder has a&>nti-theft performance. Poor, smoothly inserti ≠₹₹ng the lock cylinder in a half-rotatio> π♦n state indicates that t>π>he anti-theft effect is good.