The images for this product are misleading as it appears the accessories come in a case.
But it's just a very thin plastic tray with the pieces sticky-taped to it.
First thing I did was remove them and throw the tray out.
The accessories themselves are pretty good value, and acceptable quality when used correctly.
The trick with any rotary tool accessory, regardless of quality, is to not press too hard.
They don't have much torque, and it's the speed of the tool that does the work.
So just use the weight of the tool only, take your time and you'll find these pieces last OK and won't disintegrate.
And make sure you use the correct speed, for example, never use a high speed for wire or bristle brushes as the wire/bristles will fly out.
If you keep these things in mind, and they don't just apply to this kit but to any rotary tool accessory, they will work fine.
There is a good selection in this kit, and for most people or if you're starting out it should keep you going for a while.
Although the collets and mandrels are included, everything is interchangeable with a Dremel or any rotary tool.
For the price, and if your needs aren't too demanding, this set represents good value.
G'Day from Australia.