Wera 851/4 Z bit PH2, 89 mm length, 1/4" (6.35 mm) hex shank

Wera 851/4 Z bit PH2, 89 mm length, 1/4" (6.35 mm) hex shank is a single replacement screwdriver bit designed for Phillips (PH2) screws. With an extended 89 mm length and a 1/4" hex shank it provides additional reach while remaining compatible with standard 1/4" bit holders and power drivers. The bit is manufactured to meet common DIN ISO fit dimensions and is intended for general assembly, maintenance and repair operations where a durable PH2 tip and extended reach are required.

Advantages

The bit is made from a ductile, tough material that resists premature tip breakage and is suitable for use in hard materials. Its 1/4" hexagonal shank ensures secure seating in bit holders and quick-change chucks. The extended 89 mm length gives improved access to recessed or hard-to-reach screw heads while retaining the controlled engagement of a PH2 profile.

Suitable for

• Assembly of furniture and fixtures where recessed Phillips screws are used
• Maintenance and repair on appliances and equipment with PH2 fasteners
• Installation tasks requiring extra reach in tight spaces
• Use with power drivers and manual bit holders that accept 1/4" hex shanks

Key specifications

• Tip profile: Phillips PH2
• Length: 89 mm overall
• Shank type: 1/4" (6.35 mm) hexagonal
• Material property: ductile and tough for universal use
• Compatibility: fits standard 1/4" bit holders and quick-change chucks
• Quantity: single piece

How to use

Insert the 1/4" hex shank of the bit into a compatible bit holder or the chuck of a power driver until it seats securely. Select the PH2 bit for Phillips screw heads matching the PH2 profile. Apply steady, centered pressure and operate the driver at an appropriate speed to avoid cam-out. For manual use, fit the bit in a compatible screwdriver handle or holder and turn with controlled force to engage the screw head cleanly.

Usage recommendations

Use the bit with matching PH2 screw heads and avoid excessive side-load or torque beyond the bit’s intended application. For high-torque fastenings, consider steps to reduce stress on the tip such as pre-drilling, using the correct torque setting on power drivers, and ensuring the screw and driver are aligned. Store the bit in a dry place and inspect the tip before use; replace if visibly worn or damaged.