I recently bought a 200-piece dremel bit kit. I only needed the cutting disc but couldn't find it separately and bought the whole kit of accessories and bits.

When I opened it, there was no paper showing what is used for what kind of job. There were discs, brushes , bits of every shape , material, and color. So, here is my question: Is there an online guide to educate me which piece is used for what ? For example, which disc I can use to cut metal and which I should use for plastic ?

pdf files are prefferred for saving and future off-line reference.

Thanks