Found I couldn't turn the top collar w/o a tool and then don't want to ding the paint. So I found this strap wrench at Ace hardware. Came as a pair with a bigger one. Around $15. Works well & no damage to the paint. Now kept in my toolkit. Oh, for scale, on the other end that's a bottle opener. Gotta be able to open my beer while I'm adjusting my shocks...

Works great to adjust the shocks and I use it for an oil filter wrench too.
Mine doesn't have an opener though.