The lock cylinder adopts a number of a₩§nti-theft technologies and a variety of speci♥&©↑al-shaped anti-pulling bul↑€β✔lets to prevent technical opening.♦φ With the unique structure design of bul× lets and blades, it has high safety performance o"←↕f preventing technical $♠​©opening. The lock conta✘γiner is equipped with precision n♣→umber marble and spec♥>∑ial-shaped marble structures, which will≈§¶ be automatically locked →σwhen the number marble and₩γ special-shaped marble must be ♥✔pulled at the same time during the technical o£ pening, thus making the technical ope←₩≥ning fail. The lock cylinder uses a ₹₩≥<variety of special-shaped marble☆©→s and multiple combinations, which canε> compile up to billions of key num"δbers, thus realizing zero-open★↑↓•ing of regions (one in 16 million). The loc↔¥©♦k cylinder is added with a side-to-side pressu↑→≈ re-type side post locking pin de®♥ ±vice, which greatly improv​γ​es the ability to prevent vio$∞Ω"lent torsion.

Anti-theft standard
The security level of  ε©δanti-theft locks is divi®γΩ≤ded into A, B and C leve Ω₹ls according to national standards.
1. Class A lock cylinder, prev≠₩$ent technical opening ≥ 1 minute, anti-drilling↔¥ ≥ 10 minutes, anti-sawing ≥ 5 minute±>↕φs, anti-prying ≥ 10 minutes, anti-pulling ≥ 10 mi≤ ★nutes, anti-impact ≥®← 10 minutes.
2. Class B lock cylinder, preventing t ™λechnical opening ≥ 5 minutes, anti-• αdrilling ≥ 15 minutes, anti-s↔₽awing ≥ 5 minutes, anti-pryin±₩∞"g ≥ 15 minutes, anti-pulling ≥ 15 minute•↔•®s, and anti-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing te→§£chnical opening ≥ 10 minutes, anti-drilling ≥ α≈30 minutes, anti-sawing ≥ 30 minutes, anti-p∑"€rying ≥ 30 minutes, anti-pu♦≤λδlling ≥ 30 minutes, and•∏σ∑ anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or crescent, with a ro∞♠w of concave keyway on one side or both σα∏∞sides or a convex keyway on four sides of the cr₹αoss;
Class B: The key is flat or crescent, with two φ≠γ±rows of concave keyholes or cylindrical multi-§₹point concave keyholes on one β‌>or both sides;
Class C: The key is flat, with two rows of Ωλ​concave and S-shaped keyway ✘ ≤on one or both sides, or double snak±∞e keyway inside and outside;

Purchase Standard
The safest lock cylinder has be‍↕en upgraded to Class B and Class C. It is best toπ♦ choose Class C when ₩∞purchasing.
The first move: I used to ₽∞buy a lock to judge the qu♠≥ality of the lock cylinder by the number of key↑‍♠ teeth. It mainly depends o✘↑n the structure of the lock cylinder. The ✘♦ blade side column structure is often m¥€uch better than the traditional marbles sΩγ tructure. When picking a lock, it is better to∑< ask a professional teacher for ↕ advice and then pick it accordiσ≠∏ng to the situation.
The second move: pick the lock aσ∏nd weigh two, one than ‍π↔the weight and two to look at≠₩ the lock cylinder. The h±₩↕ eavier the weight, the better £ λ the quality of the lock cylinder, and the∑ €¶ more beads in the lock cylinder, the bet₹♠ter the anti-theft function.♥δ$♠
The third trick: choos &♠e the lock cylinder to see the color, and ‌♣¶compare the color to see​✘ the workmanship. The good∏λ¥÷ quality lock cylinder adopts electroplat¥¶‌ing treatment, the surface is smo​→oth and the color is bright. Among t☆✔₹hem, the dark yellow color is copper cor™ Ω&e, which is relatively strong and ¶ has good anti-theftε≠γ performance. The lock core is dim in  ₩color and zinc alloy is gray and has bubbles.≠" The anti-theft perfor≠β ↕mance is general.
The fourth trick: The anti-theft performan₽✘ce of the key is poor when∞£☆ the key is inserted into the÷£ lock cylinder. After theφ↕ key is half inserted, use 5 to 7 co&  mponent force to rotate clockwise o¶ r counterclockwise and continue to press t≤£he key into the lock port. T∑σhe stuck key indicates that the <✔ ¥lock cylinder has ant​'Ωδi-theft performance. Po☆✔π•or, smoothly inserting the lock cylinder  ≤↕₩in a half-rotation state indicates that t→≠he anti-theft effect is good.