The lock cylinder adop≤"♠↑ts a number of anti-theft tech≤β←∑nologies and a variety of special-shaped >♣♣→anti-pulling bullets to prevenεσ☆t technical opening. With the u™δnique structure design of bul÷₽lets and blades, it has high safety perforΩ↔"↔mance of preventing technical opening$ . The lock container is equipped with pr≠δ♥βecision number marble and☆→ special-shaped marble structures, which will≤<‍ be automatically locked when the number marble <σand special-shaped marble must be pulled at th↔>e same time during the techni∏✔©♥cal opening, thus making the≠"• technical opening fai±↑l. The lock cylinder u∑&‍ses a variety of special-shaped marbles and m​÷φultiple combinations, which can∞∞ compile up to billions of ke <αy numbers, thus realizing₩φ©€ zero-opening of regions (one in 16 mil₹₽lion). The lock cylinder is a ≈≠♠dded with a side-to-side pressur<₹e-type side post locking ←®<αpin device, which greatly improves the abilitφ¶↑♥y to prevent violent  γ↕torsion.

Anti-theft standard
The security level of anti-theft locks i→•Ωs divided into A, B and  →"→C levels according to national standards.
1. Class A lock cylind↑≈er, prevent technical opening ≥ ‍π1 minute, anti-drilling ≥ 10 mi✘₩ nutes, anti-sawing ≥ 5 minutes, anti-prying✔σ  ≥ 10 minutes, anti-pulling ≥ 10 minutes, φΩanti-impact ≥ 10 minutes.
2. Class B lock cylinder, preventing techn∏δ♥ical opening ≥ 5 minute ↔ s, anti-drilling ≥ 15 minuteε±✔s, anti-sawing ≥ 5 minutes, anti-prying ≥ 15₩δ" minutes, anti-pulling ≥  ♣"ε15 minutes, and anti£$¥-impact ≥ 15 minutes.Ω✘
3. Class C lock cylinder, preventing technical ∞$↕✘opening ≥ 10 minutes, anti-•♠drilling ≥ 30 minutes, anti×♠₽-sawing ≥ 30 minutes, anti-pr©π§&ying ≥ 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 keyway on one side or both sides or <<πa convex keyway on four s×♣♦ides of the cross;
Class B: The key is flat or crescent, with two rβ✔∞ows of concave keyholes or™∏γ₽ cylindrical multi-point concave keyholes on β♥one or both sides;
Class C: The key is flat, with two rows of con±×λ&cave and S-shaped keyway on one or bot≈¥h sides, or double snake keyway insid&≤α★e and outside;

Purchase Standard
The safest lock cylinder ha•↔₩εs been upgraded to Class B and Class C. It is bes≈±≤↓t to choose Class C when purchasing.
The first move: I used to buy≈↕÷≤ a lock to judge the quality of the ♣σ≤₹lock cylinder by the numbe♥®'r of key teeth. It ma≠☆×inly depends on the str ∏↔ucture of the lock cylinder. The ≈•↕φblade side column structure is often m"≤uch better than the traditional marbles stru₹σcture. When picking a lock, it is better<↔ to ask a professional teache™<r for advice and then pick it according to th₩&•e situation.
The second move: pick the lock and weigh two,♦÷✔Ω one than the weight a×↓φ≥nd two to look at the lock cylinder. ☆∏ The heavier the weight, the better the quali↔ ty of the lock cylinder,φ☆ and the more beads in the lock ±♥'cylinder, the better the anti-theft functio↔Ω₽¥n.
The third trick: choose the lo≤βσck cylinder to see the color, and compare theσδ∏ color to see the workmanship. The good qu‍ ality lock cylinder adopts electropla≈∞α↑ting treatment, the surf÷$↔ace is smooth and the color is bright. Among th✔¶✔em, the dark yellow color is copper core, ∏>✘×which is relatively strong and has goo₽$α&d anti-theft performanceε€↕✘. The lock core is dim in ¶‌ββcolor and zinc alloy is gray an✘ "☆d has bubbles. The anti-theft per↔✘Ωformance is general.
The fourth trick: The anti-theft pe$™rformance of the key is poo™₩☆r when the key is insert↔≥€ed into the lock cylinder.↔£β After the key is half inserted, ✔↔use 5 to 7 component ₽✘≈force to rotate clockwise or counterclockwise¥‍ and continue to press the key into the lock porσ÷∏'t. The stuck key indicates that the •€λlock cylinder has anti-the ↔βft performance. Poor, smoothly inserting φ‌•₽the lock cylinder in a half-rotation s∞ ∑tate indicates that the anti-theft effect is ↑∞βπgood.