CZS-A01, also known as Czerka security droid, was a humanoid-like droid design which was used as a base for the production of various droid models - both for military and civilian purposes - by different droid manufacturers. Full production ID for this design was droid.assassin_droid.czerka_security_a01. Like with most humanoid-shaped models, manufacturers were allowed to install wide array of internal weapons, systems and protective shileds, while droid itself was capable of using most types of blasters, rifles, autocannons and melee weapons. The original design of the droid was developed and manufactured by the Czerka Corporation

Czerka Corporation Organization Manufacturers

, but over time, other companies began to produce droids based on this design - legally, as subcontractors, or otherwise - through reverse-engineering.