TORX, developed by Textron Fastening Systems (formerly Camcar Textron), is the trademark for a type of screw head characterized by a 6-point star-shaped pattern (in the same way that slotted heads, Phillips, Hex, and Robertson have flat, ×-shaped, hexagonal, and square tips, respectively). People unfamiliar with the trademark generally use the term star, as in "star screwdriver" or "star bits". The generic name is hexalobular internal driving feature and is standardised by the International Organization for Standardization as ISO 10664.