Dell 0W4MY Single Pointing Palmrest is a replacement palmrest assembly with an integrated touchpad for compatible Latitude laptops. The touchpad provides the pointing surface, while the palmrest forms the upper case area around the keyboard.
The assembly is listed without a keyboard and includes a daughterboard. Dell identifies Latitude 5420 compatibility; EET also lists Latitude 5421 and describes the matching configurations as those without a smart card. This part is intended for systems matching that configuration.