The lock cylinder adopts a number o♣‌"f anti-theft technologies and ↕★a variety of special-shaped anti-pulling bullet®§s to prevent technical opening. With the unique s₹≠×←tructure design of bullets and ₩‍blades, it has high safety performance ¶™₹★of preventing technical o≥←pening. The lock container ✔₩is equipped with precision number$≈ marble and special-shaped marble st ₩ructures, which will be automat∑↓"ically locked when the number marble and s ≈pecial-shaped marble must b•‌e pulled at the same time during the  δλβtechnical opening, thus making the technic≤★♠✔al opening fail. The lock cylinder uses a variety₽‍ of special-shaped marbles and multiple combin'©​ations, which can compile up ∑γφ±to billions of key number®♦s, thus realizing zero-opening of regions (one ®✘§®in 16 million). The lock cylinder is added∏×α✔ with a side-to-side pressure-type λ'γside post locking pin device, which gr←↕<'eatly improves the ab§↓ility to prevent vio‌∑₩₽lent torsion.

Anti-theft standard
The security level of ant™​•¶i-theft locks is divided into A, B and C lev↑∞×els according to national s♠δ↕∑tandards.
1. Class A lock cylinder, prevent t✘←echnical opening ≥ 1 ♦×βminute, anti-drilling ≥ 10 minutes, anti-saw✘‌ing ≥ 5 minutes, anti-prying ≥ 10→←  minutes, anti-pulling ≥ 10 minutes, aλ×✔nti-impact ≥ 10 minutes.
2. Class B lock cylinder, preventπ✘γing technical opening →&≥ 5 minutes, anti-dri←™∑σlling ≥ 15 minutes, anti-sawing ≥ β±5 minutes, anti-prying ≥ 15 minutes, anti-pullingδ  ≥ 15 minutes, and anti-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing tec¥∑hnical opening ≥ 10 mi∞"nutes, anti-drilling ≥ 30 minutes¶∑σ, anti-sawing ≥ 30 min↑→↔✔utes, anti-prying ≥ 30 minu♥≈>tes, anti-pulling ≥ 30 minutes,"" and anti-impact ≥ 3€α σ0 minutes.

Classification
Class A: The key is flat or crescent, with∞λ≈ a row of concave keyway on one side or both ε₽sides or a convex keyway on &π₹ four sides of the cross;
Class B: The key is flat or crescent, with two±↕ rows of concave keyholes or cylindrical mul ♣ti-point concave keyholes>∑< on one or both sides;
Class C: The key is flat, withΩ‌ two rows of concave and S-shaped keyway on one®©γ↕ or both sides, or double snake keyway insid→™×Ωe and outside;

Purchase Standard
The safest lock cylinder has been φ ₹≥upgraded to Class B and Class C. It is±←← best to choose Clas∏δ♥★s C when purchasing.
The first move: I used to buy✘₩±ε a lock to judge the quality✘©↕" of the lock cylinder by the number±φ of key teeth. It main←®ly depends on the structure of the lock↔÷ cylinder. The blade side column str≠β✔ucture is often much bette↓ ε≥r than the traditional marbles©¥ structure. When pick↑↓≥γing a lock, it is better to ask‌∑ a professional teacher for advice and then pick ≤£πit according to the >±situation.
The second move: pick the lock and weigh two, o∞✔ne than the weight and two to look at t>Ωhe lock cylinder. The heavier the weight,©≥♦✘ the better the quality of the lock &↔cylinder, and the more b•₽ §eads in the lock cylinder, the better the anti-×‍₽δtheft function.
The third trick: choose the l ±δ₩ock cylinder to see the color, and compare₩α≤£ the color to see the workmanship. ±≤→The good quality lock cylinder adopts electr<€✘oplating treatment, the surface is smoot≈®₩♣h and the color is bright. Among them, the dark δ×♥​yellow color is copper core, which is relatγ÷λively strong and has good anti-theft perfo↔γrmance. The lock cor"↕↔e is dim in color and zinc alloy iφ÷s gray and has bubbles. The anti-theft per•₽ ∑formance is general.
The fourth trick: The anti-theft perforπ>β♣mance of the key is po αλor when the key is inserted into the lock c<★ylinder. After the key is half inserted, us§↔<e 5 to 7 component force to rotatγ≠δe clockwise or counterclockwise and continue ↕​to press the key into ÷¶≥the lock port. The stuck×↑<" key indicates that the lock cylinder×♥↕₽ has anti-theft performance. Poor, smootφ♠≤hly inserting the lock cyli∞≠ nder in a half-rotation sta‌Ωte indicates that the anti-theft effect ™§€is good.