六角，螺丝刀 

A hex key, Allen key or Allen wrench is a tool used to drive bolts and screws with hexagonal sockets in their heads. Torx developed in 1967 by Camcar Textron, is the trademark for a type of screw head characterized by a 6-point star-shaped pattern. A popular generic name for the drive is star, as in star screwdriver or star bits. The official generic name, standardized by the International Organization for Standardization as ISO 10664, is hexalobular internal.This is sometimes abbreviated in databases and catalogs as 6lobe (starting with numeral, 6, not a capital letter, G). Torx Plus is an improved head profile.Hex, Torx Keys are in stock at Tenco Electronics. Tenco offers inventory, pricing, & datasheets for Hex, Torx Keyss. To know more, please view our large section of Hex, Torx Keys below.