Patent ID: 8166851

Claim:
A driving tool for driving either a square-recessed head fastener or a Phillips head fastener, comprising: a shank portion; a bit portion, the outer end surface of which defines a symmetrical cross head configuration for insertion into a Phillips head fastener; said bit portion having four ribs and four flutes that alternate with one another and extend from said outer end surface longitudinally toward said shank portion, said flutes curving generally outwardly away from a center longitudinal axis to a first outer surface longitudinal position on said bit portion where they terminate; said ribs being defined by said adjacent flutes, each rib having a predetermined width and a transition portion extending from at least near said outer end surface to at least a first predetermined distance, said transition portion having two symmetrical side panels that interface one another at a generally 90 degree angle, so that said side panels of all four ribs define a square configuration that can drive a square-recessed head fastener when said bit is inserted into the same.