These are Body Klip Retainers from Dubro.
These work with any electric or nitro vehicles.

Lime Green rubber retainer
Steel body clips

Two lime green retainers
Eight body clips
Instructions

Nothing

The body clips are attached to the lime green strap. The strap
mounts to the the hood of the vehicle. This is so when you remove
the body clips you won't lose the clips when removed from body.