The Viper probe droid, commonly referred to as the Imperial probe droid, was a model of probe droid manufactured by Arakyd Industries and used by the Galactic Empire for deep space exploration and reconnaissance. The droid had five manipulator arms, a blaster and a communicator. They also featured a self-destruct mechanism and repulsorlift engines. The 11-3K variant of the droid was notably used on Vandor. Death Squadron deployed these droids across the galaxy in hyperdrive pods, in order to find the Rebellion's base. A probe deployed to the planet Hoth eventually found the base, which set into action the evacuation and battle that took place soon after.