Torx Bolts

A Torx bolt (often generically referred to as a "star screw" or "star bit" screw) is a type of screw drive characterized by a distinctive 6-point, star-shaped pattern in the head. It was developed in 1967 by Camcar Textron. The official generic name, standardized by the International Organization for Standardization as ISO 10664, is hexalobular internal.