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My DIY tool looks like this:

It consists of 2 turned parts, a bolt M8 X 55 and a nut.
You should place a washer under the nut, or use a flanged nut like I did.

The turned parts then look like this:

Extraction sleeve:
Outer diameter 17mm

A hole with an M8 thread in the pressure piece is very helpful for screwing the tool set together when not in use.

... you can read how to replace the bushing here ...