The lock cylinder adopt§π✘s a number of anti-the​↕ft technologies and a variety of special-shape€∏↔d anti-pulling bullets to prevent tech≠→¥nical opening. With the unique structure dε‍esign of bullets and blades, it has high safety γ♠λ±performance of preventing technical openinσ γg. The lock container is equipped with precisionφ→∑ number marble and special-shaped £♠₹marble structures, which will be automatically lo©↔>≥cked when the number marble and special-shaped ma δ≤€rble must be pulled at the same&¶ time during the techniσ♣₩cal opening, thus making the techniφαcal opening fail. The loΩ"Ω‍ck cylinder uses a variety of special-sha★♣&↓ped marbles and multiple com★γ↔∑binations, which can compile up t→©o billions of key numbers, thus realizi₩£™ng zero-opening of regions (one in ♥≠↔ 16 million). The lock cylinder is added with a sδ§ε₩ide-to-side pressure-type side pos≈≠ &t locking pin device, which greatly∏☆ β improves the ability to prevent violent torsio←©>™n.

Anti-theft standard
The security level of anti-theft l Ωocks is divided into A, B and C levels accordin¥₩€g to national standards.
1. Class A lock cylinder★•♥, prevent technical opening ≥ 1 m→₽inute, anti-drilling ≥ 10 minutes, ant≤∞←εi-sawing ≥ 5 minutes, anti-♥↑✔prying ≥ 10 minutes, anti-pulling ≥ 10 minute✘®★s, anti-impact ≥ 10 minutes.
2. Class B lock cylinder, preventing ∑δ↔technical opening ≥ 5 mβε←inutes, anti-drilling ≥ 15 minutes, anti-sawα¶♣±ing ≥ 5 minutes, anti-prying ≥ 15 minutesδ♥→, anti-pulling ≥ 15 minutes, and anti↓☆-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing techn&≥βical opening ≥ 10 minutes, anti-drilling ≥ ↓✔30 minutes, anti-sawing ≥ 30 minut↔♠es, anti-prying ≥ 30 minutes, anti-pulling ≥φφ¶± 30 minutes, and anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cresce±★​£nt, with a row of concave keyway on one side or♥∞★φ both sides or a convex keywa'α y on four sides of the cross;
Class B: The key is "‍≠flat or crescent, with two rows↕♠ of concave keyholes or cylindrical multi-point cε♠ ®oncave keyholes on one∞∏ or both sides;
Class C: The key is flat, with tw£♠✘o rows of concave and S-shaped keyway on one orφ↓ both sides, or double snake keyw™←​₽ay inside and outside;

Purchase Standard
The safest lock cylinder h"Ω∑as been upgraded to Class B and ☆ →↕Class C. It is best to choose Class C whe"≥n purchasing.
The first move: I used to buy a lock ←®®to judge the quality of the loc  >k cylinder by the number of key te↓•eth. It mainly depends on the structureε✔"™ of the lock cylinder. The blade si✘&±<de column structure is often much better÷™ than the traditional marbles str₩&&ucture. When picking a lock, it is better to  ®σΩask a professional teacher for advice and the≥♠Ωn pick it according to the s♠✔ituation.
The second move: pick the loc₩∏k and weigh two, one than the weight and two←↕© to look at the lock cylinder. The heavieδ'r the weight, the better the quality o↔↑f the lock cylinder, and &∑ε the more beads in the lock ™¥'∑cylinder, the better the anti-theft functi£←•on.
The third trick: choose the loc± ‌ k cylinder to see the color, and co™→mpare the color to see☆φ• the workmanship. The good quality lock™Ω₹∞ cylinder adopts electroplating treatment,✘↕ the surface is smooth an™¥"d the color is bright. Among them, the dark ye★≈llow color is copper core, which is rela ♥≥πtively strong and ha®↑←∞s good anti-theft performance. T₹©he lock core is dim in color and zinc alloyδλ is gray and has bubbles. The anti-tΩ≥≈heft performance is ge₽↔'δneral.
The fourth trick: The anti-theft perfor§≈×mance of the key is poor when the key is inser>¥λted into the lock cylinder. After the k‌§εey is half inserted, use 5 t​‌→₩o 7 component force to "φ↔≠rotate clockwise or counterclockw→©ise and continue to p↑✘♥'ress the key into the lock port. The stuck key✔↔α indicates that the lock cylinder♥¥ £ has anti-theft performance. ↔₽λPoor, smoothly insertin∞≈©g the lock cylinder in a half-rotation ₩§☆βstate indicates that the anti-theft effe←↔ ct is good.