This is a Fork Spring Compression tool designed for a Showa 43mm Fork, but should work on most up side sown Forks with a maximum cap diameter of 51mm.

You need a minimum of two M10 screws and four M10 nuts as well.
You can also add two ring nuts if you want it to be fancy ;)

I recommend to file down the first 10mm of the thread so that it does not dig into the plastic part of the fork.

The spring can now either be easily be compressed by a second person or by putting a ratchet strap through the ring nuts and the bottom of the fork.

Also see my other Fork Service Tools:

Fork Spring Compression Tool Showa 43mm
https://www.thingiverse.com/thing:4860412

Fork Seal Driver Tool for Showa 43 mm
https://www.thingiverse.com/thing:4858356

Fork Oil Level Gauge Suspension Tool
https://www.thingiverse.com/thing:4863952