The first trick: buy a stainless steel lock and look at the "teeth" of the key. The more teeth, the deeper the teeth, the more complex the arrangement, the greater the difficulty of opening, and the better the anti-theft performance.
The second trick: pick the stainless steel lock and weigh it by the catties, and compare the weight with the stainless steel lock core. The heavier the weight, the better the quality of the stainless steel lock core, and the more beads in the stainless steel lock core, the better the anti-theft function.
The third trick: choose the stainless steel lock core to look at the color, and look at the workmanship compared to the color. The stainless steel lock core of good quality is electroplated, the surface is smooth, and the color is bright. Among them, the dark yellow color is copper core, which is relatively strong and has better anti-theft performance. The stainless steel lock core has a dim color and the gray-white color with bubbles is zinc alloy, which has average anti-theft performance.
The fourth trick: The key is inserted into the stainless steel lock core and the card has poor anti-theft performance. After the key is half inserted, use 5 to 7 minutes of force to rotate clockwise or counterclockwise and continue to press the key into the stainless steel lock port. The key is stuck. It shows that the stainless steel lock core has poor anti-theft performance, and the stainless steel lock core is inserted smoothly in the semi-rotating state, indicating that the anti-theft effect is good.