The lock cylinder adopts a number of anti-theft↓≤ technologies and a variety o¶↑φf special-shaped anti-pulling b¥ ♠ullets to prevent technπ↕λ☆ical opening. With the unique structure design ‌↔ of bullets and blades, it has ∞Ωφhigh safety performance♥πγ✔ of preventing technical opening. The lock←§ container is equipped with precision number mar•★ble and special-shaped maσπ→≤rble structures, which will be automatically l₹₩•ocked when the number marble and£Ω special-shaped marble must be pulled at the sam→λ&‍e time during the technical opening, thus ma×  king the technical o'↑♣↑pening fail. The lock cylinde®☆r uses a variety of special-shaped m♠€♠↔arbles and multiple combinations,↑‌δ which can compile up to billion↓¥s of key numbers, thus realizi¶↑₹ng zero-opening of regions (one∏£≈ in 16 million). The lockγ±≥ cylinder is added with​☆₽< a side-to-side pressure-type side post "←¥locking pin device, which greatly improves ☆≠→≠the ability to prevent violent to→§rsion.

Anti-theft standard
The security level of anti-theft locks is¶ ∑ divided into A, B and C levels according to‌⧩ national standards.
1. Class A lock cylinder, prevent technical ope$ ning ≥ 1 minute, anti-drillin>®<g ≥ 10 minutes, anti∑↔✔-sawing ≥ 5 minutes, anti-prying ≥ 10 minutes,♠×σ₩ anti-pulling ≥ 10 minutes, anti-impact ≥ 10 min≥₹utes.
2. Class B lock cylinder, preventing technica→‍l opening ≥ 5 minutes, anti-↓ββdrilling ≥ 15 minutes, anti-sawing ≥ ¶ ♣5 minutes, anti-prying ≥ 15 minutes, anti-pulling>→ ≥ 15 minutes, and anti-impact ≥ 15 minu∏≤↕♠tes.
3. Class C lock cylinder, preve€αnting technical opening ≥ 1→☆♥≠0 minutes, anti-drilling ≥ 30 minutσγ₩es, anti-sawing ≥ 30 minutes, anti-prying ≥ 30 ♠‌±≥minutes, anti-pulling ≥ 30 minutes, and aφ‍★nti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cres$×↕cent, with a row of concav₹€<≠e keyway on one side or both sides or a conve  ÷×x keyway on four sides of the cross;
Class B: The key is flat o‌"γ∑r crescent, with two rows of co≥↑εncave keyholes or cylindrical mult€¶εi-point concave keyholes on one or ¶'both sides;
Class C: The key is flat, with two row<←σ÷s of concave and S-shaped keyway ‌≈<on one or both sides, or double ↕↔∞snake keyway inside and outsidδ"•↔e;

Purchase Standard
The safest lock cylinder has been upgraded to§↔' Class B and Class C. It is best to choos‌£♠←e Class C when purchas×☆ing.
The first move: I used to buy a lock to judge t ™γ'he quality of the lock cylinder by the numbe≠ •r of key teeth. It mainly depen<∑♠ds on the structure of the lock cylδ $inder. The blade side column structure is o∏∏βften much better than©←‍ the traditional marbles structure. When picki↑§ng a lock, it is better to a¶✔δsk a professional teacher for advice and th Ω≥en pick it according to the situati¥£↓∞on.
The second move: pick the lock and weigh λ§₩↔two, one than the weight and two to >¶look at the lock cylinder. The heavi♠‍₩εer the weight, the better the quality of the l≥£ock cylinder, and the more beads in ±π←↓the lock cylinder, thσαe better the anti-theft func>₽ tion.
The third trick: choose the lock cylinder to ✔δsee the color, and compare the color tβ↑♣‌o see the workmanship. The good quality lock cy™®linder adopts electroplating treat™ ment, the surface is smooth a​♦∞γnd the color is bright. Among them, th ¥✔e dark yellow color is≤©©☆ copper core, which is relatively strong and hεδαas good anti-theft performanΩ‌γλce. The lock core is dim in color and zinc alloy  €Ω is gray and has bubbl>Ω×es. The anti-theft perfo™↑rmance is general.
The fourth trick: The anti-theft performan×₩•<ce of the key is poor whe↓¥×n the key is inserted into the lock cy÷™ linder. After the key is half inserted, use 5 to ≥≠™↓7 component force to rotate clockwise or co±←>'unterclockwise and continue to p↑→ress the key into the >♦φ€lock port. The stuck key indicates tha≥↑∞♥t the lock cylinder has anti-the"∑βft performance. Poor, smoo‌←thly inserting the lock ®©cylinder in a half-rotation state∑♥®• indicates that the anti-theft σ∞≥±effect is good.