This is an optional part for R/C vehicles - a steel receiver antenna.
This piece replaces your receiver antenna with a 2mm thick piece of steel wire.

This Package Includes:
(1) Steel antenna (250mm long, with attached mount)
(1) 3mm flanged nut
(1) 3X10mm machine thread screw
(1) 3X10mm flat head screw
(1) Eyelet for the RX antenna wire
& very brief instructions on how to install this antenna

Features:
More durable antenna
Some "roll over" help (if your vehicle "goes on its lid" this antenna is
stiff and may put the vehicle right-side-up).