The bit is dimensioned to provide the correct fit for the specified internal hexagon size and can therefore be used where precise contact surface between bit and screw is crucial

as these screws cannot be actuated with "normal" TORX® tools

Maximum durability and long life

Source: Intercable product page (Intercable Tools / Weitkowitz)

Product name: Clip 5-20 mm tool holder

Bit serie 4 torx 1/4": TX15x50mm MIL57983101111 The bit is dimensioned toProduct Overview The Wera 05060133001 is an 867 4 Z TORX bit in size TX 15 with an overall length of 50 mm. The product is a TORX bit designed for recessed TORX screws and comes with a 1 4" hexagon drive in Wera's connecting series 4. The description of the 05060133001 indicates that the bit type is a Z version, which in the manufacturer's documentation is described as "tough" and suitable for universal use. Design and Function This 867 4 Z TORX bit