This is an OEM cartridge key for my Hitachi D10VF.
This is the original chuck key for my Hitachi D10VF drill that I can reuse. The keyholes on this drill are smaller than any of my other chucks so nothing worked until I found this. A screwdriver is no longer required to tighten the chuck. Hooray.
Pros
Hitachi Power Tools renamed Metabo HPT. The same great tools, just with a new name.