Bit set Wera 855/4 Z Pozidriv PZ1 4.5 mm 89 mm shaft, 4-piece

Wera 855/4 Z Pozidriv PZ1 4.5 mm 89 mm shaft, 4-piece is a compact set of precision bits intended for driving Pozidriv fasteners. Each bit features a PZ1 tip with a 4.5 mm effective diameter and an 89 mm shaft length to reach recessed or obstructed screw heads. Manufactured from hardened steel, the bits are compatible with standard bit holders, bit sockets and screwdriver handles that accept interchangeable bits.

Advantages

The set provides consistent tip geometry for secure engagement with Pozidriv fasteners and reduced cam-out. Hardened steel construction ensures wear resistance and long service life under repeated use. The 89 mm shaft length improves access to fasteners located in deeper or narrow cavities while maintaining control and torque transfer when used with standard bit holders.

Suitable for

• Assembly of furniture and fixtures where Pozidriv screws are specified
• Maintenance and repair tasks requiring PZ1 driver bits
• Electrical and electronic installation work with recessed Pozidriv fasteners
• General workshop use with interchangeable bit holders and ratchets

Key specifications

• Tip type: Pozidriv PZ1
• Tip diameter (effective): approximately 4.5 mm
• Shaft length: 89 mm
• Set size: 4 pieces
• Material: hardened steel for improved durability

How to use

Select a PZ1 bit from the set and insert it securely into a compatible bit holder, magnetic bit socket or screwdriver handle. Align the Pozidriv tip with the fastener head, apply steady axial pressure and turn the bit using the appropriate drive tool. For recessed screws, the 89 mm shaft provides extra reach—ensure stable positioning of the tool and avoid excessive side load to prevent tip wear.

Recommendations

Use the bits at appropriate torque levels for the fastener size and material. Store the bits dry and free from corrosive substances. Replace bits if tips become rounded or damaged to maintain safe and effective engagement with Pozidriv fasteners.