I saw Mokeyjay's For the first time in my life, I was invited to the police station for tea , scared us to throw away the similar box opener.

Theoretically, all spring knives with "self-locking device" are considered " Control tool 」。

However, the Ministry of Public Security does not seem to have a specific definition of what a "self-locking device" is, and its discretion in the implementation process seems to be not small. After all, the whole definition is vague（

Once when I saw Xiaomi's products, I found a mini box opener: fire mini box opener

The appearance is passable, 20 yuan is also very cheap. It took a while to talk about the experience.

At ordinary times, I always use the scalpel on the picture when unpacking (look at the rusty blade). Before that, I was opening the box with a penknife, but the OLFA "Xiaohuang" who had accompanied me for many years disappeared without any reason.

The scalpel blade is cheap and very sharp. It is also easy to replace. It can also be used for welding. It has always been one of our handy tools.

The shortcomings of the scalpel are similar to those of the art knife. The blade is too sharp and long, and it will scratch the contents if it is badly packaged by the head iron seller. The handle of the heat opening knife is designed as a sickle, which is more like "hooking" the express box from inside to outside rather than cutting it.

The design concept was good at the beginning, but they didn't seem to consider one problem:

Their blades are too thick to fit into the gap of the express box.

As shown in the figure, the express box itself is tightly wrapped, and the blade cannot be smoothly inserted into the gap when the blade is very thick.

But every penny is worth every commodity. What kind of bicycle is this price. And for most packages, it can be opened smoothly.

In a word, I think it's very useful before I buy it, but after I buy it, I think it's just like that.

It's like you bought a game in Steam (x