This is a hex attachment for my GP Toys Judge S920 and I actually needed this for my DEERC car because I wanted to use GP Toys' bigger tires (air-filled) on it. So it needed hex attachments and the hex attachment on the DEERC RC car wasn't coming off of the original tire so I had to design a new one. Unfortunately it didn't really work, even though it was the EXACT model, maybe its just me and the way I tightened the screw or something, but you guys can try if you want, it's a really fast print and would be really appreciative if you would also post a make. Later on, when I was attaching the original tires back on, the hex attachment from them came off so I just used those and everything worked out ;) As you can see in the pictures/images, it took a lot of trial and error to get the EXACT measurements, and STILL didn't work, maybe its just 3D printer filament, I don't know, even the though the hex attachment on the original tires are PLASTIC!