Inspired by Bicycle Bottom Bracket socket tools I measured and modeled a ½" drive socket to engage my Rain Bird sprinkler heads to aid in screwing and unscrewing them for replacement (without replacing the outer “cans”).

I've created models with both 2 slot engagement and 4 in case you have a preference.

*Disclaimer: My sprinklers are winterized now and not needing service so I haven't tried to test this in practice yet.  I envision PETG or PLA+ with a strong infill would be needed to have a chance of not cracking apart in use.

My print shown is 80% infill of cubic subdivision, 0.2 layer height with inland PLA on an Ender 3 Pro.  Printed without support.