Using Role Modeling and Synthesis to Reduce Complexity in Agent-Based System Design

A compact screwdriver bit which can be operated interchangeably by a known type one way ratchet wrench type driver having a square shaped bit receiving opening or by a known spinner type handle having a bit controlling member. The bit employs an elongated shank having a screwdriver tip at one end and a body at the other end, the body having an axially extending opening. When the wrench type driver is used, the body is fitted into the bit receiving opening. When the screwdriver type driver is used, the bit controlling member is fitted into the opening in the body.