Dremel 395 rotary tool - not working

You will have to remove the plastic cap on the end of the tool where the tips go in. Then screw on the cutting guide.

find the little square attachment and place on the end of the dremel tool. I didid the same thing. Worked fine after I put the other part on.

Remove the collet nut and collet then unscrew the sealing cap (black plastic ring), this has the same thread as the inner of the multi kit tool, so just screw on the tool then replace the collet and nut

hello. You loosen the arbor at the base of the shaft closest to the tool. There is a tiny wrench in the kit that came with the dremel, or you can use a pair of pliers to loosen it. Joe

Drywall dust has ruined your tool. It seizes up bearings and bushings like you wouldn't believe.

Flex Shaft, Sanding Disks, Polishing Pads, Metal Blades, Wire Brushes, Abrasive Brushes.

You need a # 402 bit. This comes with a screw on top that detaches and goes through the hole in the cutting wheel (very small hole). Then just re-attach it to the bit and you're in business. Depending on the particular cut-off wheel you're using, the wheel can be extremely fragile. Even though it will cut steel, it is brittle. ALWAYS wear safety glasses when using a cut-off wheel particularly, they will inevitably shatter and go flying!
Probably best to go to a local hobby store, buy a few bits for $10, and pick the owners brain about the tool.

Do not use the threaded bit. You need a mandrel that has a tiny screw on the top. Take the screw out and thread it onto the cutting wheel and then screw it back on. My book says its mandrel #401.

REFERENCE M/N: 395 - Type 3 - Dremel does not have the parts listing on their site for some reason. I actually have the original I saved from 1988!
The part number for the Nylon Coupler is:
Illustration Code Number: 5
Description: Flex Coupling
Part Number: 529430970

This is all from Drawing (Form) Number:5296074 10-88