The lock cylinder ado φδ×pts a number of anti-theft technologies and a ₹∞variety of special-s ©<haped anti-pulling bulletsε∏₽ to prevent technica€>↔l opening. With the unique structure design  ←×of bullets and blades♠β, it has high safety perδ ™formance of preventingα♣ β technical opening. The lock container  αis equipped with precision number marble an♦δ d special-shaped marble structures, which will±•• be automatically locked when the number marble ↔₽☆≈and special-shaped marble must be pulled at th≥♣≈e same time during the technical o↓≤pening, thus making the technical≥™ opening fail. The lock cylinλ‍der uses a variety of special-shape©"£βd marbles and multiple combinations, which c©∑"an compile up to billions‌‌ of key numbers, thuφ♥≠‍s realizing zero-opening  ¥of regions (one in 16 milli∏<$✔on). The lock cylinder i↓§s added with a side-to-side pressure-t×≤♠αype side post locking pin devic✘®≠e, which greatly improves the a&≈bility to prevent violent torsio>‌&n.

Anti-theft standard
The security level of anti-theft locks is divi™♥ ∞ded into A, B and C levels according to nat✘♦÷¶ional standards.
1. Class A lock cylinder,$> prevent technical opening ≥ 1 minute, antiλ₽©✔-drilling ≥ 10 minutes, anti-sawing ≥ 5 minut∏≤✘es, anti-prying ≥ 10 minutes, a✔↓nti-pulling ≥ 10 minutes, anti-impact ≥ 10 m♠γinutes.
2. Class B lock cylinder, preventing technical oφ↑ pening ≥ 5 minutes, anti-d☆&$rilling ≥ 15 minutes, anti-sa•♦wing ≥ 5 minutes, anti-prying ≥ 15 ≥'minutes, anti-pulling ≥ 15 minutes, and ant‍₩↓<i-impact ≥ 15 minutes.
3. Class C lock cylinder, pre™σ€∑venting technical opening ≥★'‌ 10 minutes, anti-dri ✔lling ≥ 30 minutes, anti-sawing∏​ γ ≥ 30 minutes, anti-prying£≥ ≥ 30 minutes, anti-pulling §★≥ 30 minutes, and anti-φπγimpact ≥ 30 minutes.

Classification
Class A: The key is flat or cr↕γescent, with a row of​☆  concave keyway on onφ☆±e side or both sides or a conv₹π§®ex keyway on four sides of the cross;
Class B: The key is flat or crescent, with>≥ two rows of concave kλ≤÷eyholes or cylindrical mult£₽>i-point concave keyholes on one or both side≤¶®♣s;
Class C: The key is flat★  , with two rows of concave and S-sδ×&∏haped keyway on one or both sides, or doub←σ↑ le snake keyway inside and outside;

Purchase Standard
The safest lock cylinder has been γσ♥upgraded to Class B and Class C. I₩≈☆t is best to choose Class C when purchasing.
The first move: I used to buy a lock to¶× judge the quality of the lock cylinde§€✔§r by the number of key teeth. It mainly depends o& σ←n the structure of the lock cylinder. &​$The blade side column str÷λucture is often much better than☆βγ the traditional marblφ←es structure. When picking a l←£♦ock, it is better to✘©✔ ask a professional teacher for adγ∏¶vice and then pick it according to the situati♥≈↓∞on.
The second move: pick the lock and weigh two, o↓ • ne than the weight and two to look at 'βthe lock cylinder. The heavier the weight, the ✔​♦better the quality of the l&δ₽ock cylinder, and the ♦™more beads in the lock cylinder, the betεφter the anti-theft function.
The third trick: choos•"★→e the lock cylinder to see the color, and compaλσ‌‍re the color to see the workmanship. The good quδγ$αality lock cylinder adopts electroplating trea→≥≠★tment, the surface is s↕α≤mooth and the color is bright. Amon±δg them, the dark yellow colo♠γ£♥r is copper core, which is relatively s∞↓trong and has good anti-t§™×heft performance. The lock£¥✔ core is dim in color and zinc alloy is gray and ∑‍has bubbles. The anti-theft ≥♠ •performance is general.
The fourth trick: The anti-theft performa≤↕πσnce of the key is poγ​λ"or when the key is inserted into the lock cyli×♥nder. After the key is half÷™ inserted, use 5 to 7 co∑λ>₽mponent force to rotate clockwise or co±×αunterclockwise and continue to press the key i₹÷←nto the lock port. The stuck key indic↓₽₹ates that the lock cylinder has→•• anti-theft performance. Poor, smoothly φ♣‌αinserting the lock cylinder in a half-rota®♣tion state indicates that th↑₩¶∞e anti-theft effect is good.