I used to really like this tool rack because it could easily slide into the slot of the extruder. However, it was not very convenient to use due to the lack of dedicated slots for hexagonal wrenches. So I made some adjustments and stored other commonly used tools in it as well. However, this design limits the maximum printing height - if you often print models close to the printer's maximum height, you may need to find another solution. But for users who mainly print small objects, this tool rack is completely sufficient, and it's also very convenient to easily take out and put back large objects when

The fit between this tool rack and the hexagonal wrench is quite tight, which I'm very satisfied with - other tool racks I've used in the past were always loose and wobbly, and they would occasionally make creaking noises, which was really annoying. Of course, if your 3D printer isn't accurate enough, you might find that these tool racks don't fit very well. After all, they're designed to be quite tight, and in most cases, you'll need to push and pull them hard to successfully install or remove them.