The T55 Torx Bits - Hardened Steel has the following features:Not Standardised Manufacturing Standard, 35mm Overall Length (L), Torx Drive Type, Hardened Steel Material, Hardened Steel Material Specification, Metric Metric or Imperial?, T55 Drive Size (D), 1/4 inch Socket Size (A/F). Discover more about the Drive Bits range. Accu has a large range of individual Drive Bits which are designed to fit into the end of a hand operated screwdriver or electric drill. The vast majority of Bits feature a ¼” retaining hexagon for securing into the screwdriver tool, with alternative socket sizes available for specialist bits. Standard Bits Within our standard range of Drive Bits is the popular Torx Bit, featuring a Hexalobular shaped drive that allows for high torque transmission and increased resistance to cam-out. Accu also stocks more traditional drive types, such as Phillips and Pozi Bits, as well as the Square Head (Robertson Drive) Bit which was initially designed as an improvement upon the Slotted Drive (Flat Head) to discourage driver disengagement. Hafren Security Drive Bits Accu is an approved distributor of Hafren Security Fasteners range of specialist tamper-resistant fasteners, drive bits and installation tools. Included within this high security range are the Scroll Driver Tool, 5-Lobe Pin Bits and both the Kinmar Permanent and Removable Driver Sockets. Wera Screwdriver Bits Wera have become known as the ‘Tool Rebels’ within the fastener industry, developing new solutions to difficult problems. Along with stocking a range of their Steel Drive Bits, including Bits for Assy Screws and Ball End Hex Bits, Accu is also able to supply a standard range of Wera’s Vacuum Ice Hardened Stainless Steel Bits, designed specifically to prevent extraneous rust forming, whilst meeting the required industrial hardness.