Wera TORX® bit 4 mm, model 867/4 Z — 89 mm length, 1/4" (25.4/4 mm) hex shank

Wera TORX® bit 4 mm, model 867/4 Z is a single precision bit with a TORX 4 tip and an overall length of 89 mm. The bit features a 1/4" (6.35 mm) hex shank compatible with standard 1/4" toolholders and screwdrivers and is designed for fastening and loosening recessed TORX screws in mechanical, electronics and assembly applications. Constructed for universal use, the bit delivers reliable engagement in TORX recesses while its longer 89 mm length provides improved access to recessed or hard-to-reach fasteners compared with standard short bits.

Advantages

The bit is made from high-quality hardened material with a viscous/tough finish to resist wear and provide consistent torque transfer. Its 1/4" hex shank conforms to common holder standards for quick change and secure retention. The extended 89 mm length gives added reach for assembly and maintenance tasks without sacrificing precision at the TORX tip. Compact and single-piece construction reduces wobble and improves control during precision work.

Suitable for

• Fastening and removing TORX screws in mechanical assemblies
• Electronics repair and component assembly where TORX 4 is specified
• Maintenance and service work requiring extended reach
• Use with 1/4" hex drivers, bit holders and quick-change systems

Key specifications

• TORX tip size: T4 (4 mm)
• Overall length: 89 mm
• Shank type: 1/4" (6.35 mm) hex
• Material finish: tough/viscous surface treatment for wear resistance
• Compatibility: fits standard 1/4" quick-change holders (DIN ISO 1173-F 6.3 compatible)

How to use

Insert the 1/4" hex shank of the Wera TORX 4 bit into a compatible bit holder, driver, or quick-change chuck until it locks. Align the TORX tip with the screw recess and apply steady axial pressure while turning the driver to engage the head. For tightening, turn clockwise; for loosening, turn counter-clockwise. Use controlled torque to avoid cam-out and inspect the tip for wear before precision tasks.

Usage recommendations

For best results use the bit with a matched 1/4" holder or torque-controlled driver to prevent over-torquing. Replace the bit when tip wear or rounding appears to maintain secure engagement with TORX fasteners. Store in a dry place to preserve the surface treatment.