The lock cylinder adopts a number↑♦​ of anti-theft technologies and a varα ↕‍iety of special-shaped anti-pulling ÷¶bullets to prevent technical openi♠ ng. With the unique str×βucture design of bullets and blades,   <it has high safety performance of prevent≥$₩ing technical opening. The lock container is€‍ equipped with precision number marble ∞•≠and special-shaped marbleΩβ≈ structures, which will be automatically lockφ₩ed when the number marble and special-shaped™α♦ marble must be pulled at the same time ∏>during the technical opening,♦γ¶♥ thus making the technic$σal opening fail. The lock∞↑♠ cylinder uses a variety of special-shaped ​βmarbles and multiple combinations, which ₩σ✔®can compile up to billions of key number‍™¶↔s, thus realizing zero-ope£ ning of regions (one in 16 ×$✘million). The lock cylinder is added ≥£with a side-to-side pressure-type side ‍σ•♠post locking pin device, which greatly im€✔$proves the ability to prevent violent torsion.

Anti-theft standard
The security level of a×™✔nti-theft locks is divide¶♣d into A, B and C levels according±α to national standards.
1. Class A lock cylinder, prevent technical φ™∞✔opening ≥ 1 minute, anti-drilling ​₽≥ 10 minutes, anti-sa•×wing ≥ 5 minutes, anti-pryi•"‌§ng ≥ 10 minutes, anti-pulling Ωδα♥≥ 10 minutes, anti-impact ≥ 10 ↔£minutes.
2. Class B lock cylinder, preve↓✘÷nting technical opening ≥ 5 minuteδ>↑✘s, anti-drilling ≥ 15 minutes,©ε anti-sawing ≥ 5 min☆"$§utes, anti-prying ≥ 15 m★♦©inutes, anti-pulling ≥∑≤‍ 15 minutes, and anti-impact ≥ 15 mi€↑→≥nutes.
3. Class C lock cylinder, preventing techni±‌ cal opening ≥ 10 minutes, anti-dri≠σ↔lling ≥ 30 minutes, anti-sawing ≥ 30 minutes, an↓‍→"ti-prying ≥ 30 minutes, anti-pulling ≥ 30 minute☆γs, and anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cres•≥cent, with a row of concave key÷α×way on one side or both ¶§↓sides or a convex keyway on four sides of the ✘"×≤cross;
Class B: The key is flat or cres←Ω&cent, with two rows of concave keyholes or cylin₹₹↕λdrical multi-point concave keyholes on &®™one or both sides;
Class C: The key is fla&®t, with two rows of concav≠≈™♥e and S-shaped keyway on ₹Ωone or both sides, or double ©&φsnake keyway inside and outside;

Purchase Standard
The safest lock cylinder has b↑$"een upgraded to Class B and Class ≤γ↑εC. It is best to choose Class C when purc♠$hasing.
The first move: I used toβ™ buy a lock to judge the quali♥↓‍&ty of the lock cylinder by the number of key  $&teeth. It mainly depends on >δβthe structure of the lock cylin§$λ♦der. The blade side column stru₽₹cture is often much better♦✘☆π than the traditional m$≠±arbles structure. When picking a lock, it is bett"↑er to ask a professional t±↑eacher for advice and then pick it™• according to the situation.
The second move: pick t>₽€he lock and weigh two, one than↑ ★ the weight and two to look at the lock cyli≠¥₹ nder. The heavier the weγ​ight, the better the qualityδ©↔ of the lock cylinder, and the more ♣↕☆ beads in the lock cyli₩ε∞εnder, the better the anti-theft function.♠&
The third trick: choose the lock cylinder t§ βγo see the color, and compare the color to see t×€he workmanship. The go☆$γod quality lock cylinder adopts electrγε↓≥oplating treatment, the surface is smooth and th↕βe color is bright. Among ∏σthem, the dark yellow color is c♦λ​opper core, which is relatively st→φ♣rong and has good anti-theft performance. The✘ ←§ lock core is dim in color and zinc allo'>♠σy is gray and has bubbles. The anti-theft perfor‍÷φmance is general.
The fourth trick: The anti-theft ≤↑€performance of the key is p✔'oor when the key is inserted into theσ®& lock cylinder. After ♠φ↑βthe key is half inserted, use 5 to 7 comp<₹&onent force to rotate clockwise or c←≈↓≈ounterclockwise and continue to press the k•¶$ey into the lock port. The stuck ≈↓key indicates that the loc'©¶​k cylinder has anti-theft performance. Poor, smβ•₩×oothly inserting the lock cylinder in a half-δ☆rotation state indicates that the a→εnti-theft effect is good.