I've created this wrench, because other one I could find on Thingiverse had a weak point close to the yaws - and I've already broken two. This one hopefully is perfect ;) I've also added few tapers and fillets for ease of use.
- updated open part, sizes and angles for better fit
More my CNC upgrades: https://www.thingiverse.com/Saur0n/collections/sshop-cnc
Just use 3+ perimeters (mine was printed with 4) and some decent infill like 40%. PLA recommended.