Wera 851/4 Z bits

Wera 851/4 Z bits are high-quality Phillips (PH2) screwdriver bits engineered for precision and durability. The bit has an overall length of 89 mm and a 1/4" (6.35 mm) hexagonal shank compatible with standard bit holders manufactured to DIN ISO 1173‑F 6.3. These bits are designed to provide a secure fit and reliable performance across a range of assembly and repair tasks.

Advantages

The Wera 851/4 Z combines a tough, viscous material for universal use with precise Phillips geometry to reduce cam‑out and improve contact with screw heads. The 1/4" hex shank ensures compatibility with common holders and quick‑change systems, while the 89 mm length gives additional reach in confined or recessed locations.

Suitable for

• General assembly and maintenance work involving Phillips (PH2) screws
• Electronics and appliance repair where a reliable PH2 bit is required
• Automotive interiors and trim fastening tasks
• Construction and carpentry jobs needing a 1/4" hex bit in a holder

Key specifications

• Type: Phillips screwdriver bit (PH2)
• Length: 89 mm
• Shank: 1/4" hexagon (6.35 mm), compatible with DIN ISO 1173‑F 6.3 holders
• Brand: Wera
• Manufacturer part number (MPN): 05059775001
• EAN: 2050000314285

How to use

Insert the 1/4" hex shank into a compatible bit holder or quick‑change chuck until it seats securely. Use the PH2 tip to engage Phillips screw heads, applying steady axial pressure and controlled torque to avoid stripping. For access in recessed areas, use the full 89 mm length to reach the screw; withdraw and inspect the bit tip regularly for wear.

Recommendations

Use with holders and drivers that conform to DIN ISO 1173‑F 6.3 and avoid excessive torque beyond the bit and screw specifications. Replace the bit if the tip shows rounding or damage to maintain secure engagement with Phillips screws.