480-TX-40I Apex 5/16'' Torx Insert Bits, Intermediate Hardness

5/16'' Apex® Torx ® Insert Bits, Intermediate Hardness Description

Apex® 5/16'' hex insert drive Torx ® screwdriver bits, intermediate hardness from Apex® Fastener Tools, formally Cooper Tools. Torx ® fasteners are becoming extremely common in automotive repair and appliance assembly. By design, Torx ® head screws resist cam-out better than Phillips ® head or Slotted head screws. Where Phillips ® heads were designed to cause the driver to cam-out, to prevent over tightening, Torx ® heads were designed to prevent cam-out. The reason for this was the development of better torque-limiting automatic screwdrivers for use in factories.

Apex Fastener Tools Catalog Page: 10