This is an optional ST Racing Concepts CNC Machined Aluminum Threaded Rear Shock Body & Collar Set, and is intended for use with the Losi
XXX-SCT. The XXX-SCT comes with aluminum shock bodies out of the box,
but these CNC Machined Aluminum threaded shock bodies & collars
provide the user with the ability to fine tune the spring pre-load
without the worry of the collars popping off during a hard landing. Just
install the shock internals from the original shocks into these shock
bodies and you are ready to go.