Beyond the B1 and B2 models, multiple other types of specialized battle droids have been featured in the "Star Wars" fictional universe. The droideka is a three-legged heavy infantry unit designed by the Colicoids, a bloodthirsty insect-like species which it resembles. It is equipped with twin blasters and a deflector shield generator and can transform into its wheel form, allowing the droideka to roll towards the enemy at speeds of up to . Commando droids are superior versions of the B1 battle droid, built sturdier with armor to withstand blaster fire and more advanced combat programming and battlefield awareness. The T-series tactical droids serve as advisors to Separatist commanders or command groups of other battle droids, while super tactical droids serve as generals of droid armies and fleets. Droid vehicles and spacecraft include Vulture droids, Dwarf spider droids and Hailfire droids. After the Clone Wars, the Imperial Senate banned the manufacture of battle droids, but with loopholes for the building of "security" droids. This includes the Imperial military's KX-series of which K-2SO is an example.