Just a quick Gridfinity project to house my Pittsburgh Pro U-Joints from Harbor Freight, plus a ½ in to 3/8 impact adapter. Parts fit loosely into their slots for easy access.
https://www.harborfreight.com/universal-impact-joint-set-3-piece-67986.html?_br_psugg_q=impact+universal+joint
https://www.harborfreight.com/universal-impact-joint-set-2-piece-67920.html?_br_psugg_q=pittsburgh+pro+universal+wrench+set
The author marked this model as their own original creation.