Will this work on my coilover setup?

If your adjustment rings are 3.25" in diameter, this wrench will fit. Measure the outer diameter of your adjustment collar before ordering to confirm compatibility.

Do I need any other tools to adjust my coilovers?

This spanner wrench handles ring rotation. You'll also need a wrench or socket to hold the shock shaft steady while turning the adjustment ring — most shops use a 10mm or 12mm depending on your shock brand.

Can I use this wrench on coilovers with different ring sizes?

No. This tool is cut for 3.25" rings only. Forcing it onto a smaller or larger ring will strip the notches and damage both the wrench and your adjustment collar.