This is a socket designed to fit the T-Shaped bolt head of the adjuster for the John Deere Electric Spreader made by Spyker. If anyone has ever tried to adjust these things by hand, you will quickly realize that it tears the heck out of your knuckles if you have big hands.
This socket head is designed to fit on a 1/4" drive screw driver, and the other side obviously fits the spreader adjusting head. Although it is intended to fit this adjuster head perfectly, it very well might work on other Spyker spreaders or even others.
Just buy a generic 1/4" Driver for a dedicated handle and press to fit. I designed it purposely tight. Pics are kind of hard to make out, but use the STL viewer to get a better perspective.
Not sure how this site will orientate the STL but, print with the 1/4" Socket down, so the part looks like a coffee cup. No Rafts or Supports are needed. Low to Medium resolution works best. Scale as needed for your printer.
Designed in Fusion 360