Associated SC10 4×4 wheel hexes
New from Associated, these wheel hexes, with locking cross pins, make it easier for you to remove your wheels and tires without worry. The cross pin is now captured inside the hex with an M3 screw. A great addition to your SC10 4×4 whether you are running in the back yard with your friends or competing at the local track.
Source: Associated [rc10.com]