Supports-free printing, prevents loss of car keys, motorcycle keys, etc.

If you, like me, often misplace your keys, then you definitely need this. As long as your key width does not exceed 45mm, you can use it. I lost a key six months ago. I'm the kind of person who is always misplacing things. Every time I finished using the key, I would put it away randomly, resulting in not being able to find it when I needed it. So I decided to make one to prevent this from happening again. Every time I finish using it, I put it in a fixed place, so I won't lose it again. Nowadays, smart keys are not cheap; they usually cost hundreds of dollars per key. If you lose two keys, you'll have to replace the lock, which will cost thousands of dollars.