Screwdriver Bit Wera 855/1 BDC SB

The Wera 855/1 BDC SB screwdriver bit is a compact Pozidriv bit designed for precision fastening tasks. With a PZ 1 tip and a length of 25 mm, it is suitable for use in manual screwdrivers and powered drivers that accept a 1/4" hexagonal shank. The bit construction emphasizes accurate engagement with Pozidriv screw heads, consistent torque transfer and resistance to wear during repeated use.

Advantages

The bit’s Pozidriv geometry provides reliable contact with compatible screws, reducing cam-out and improving control. Its 1/4" hexagonal shank ensures secure seating in chucks and bit holders, enabling stable operation in both hand and power tools. The short 25 mm overall length offers good access in confined spaces while maintaining sufficient leverage for precise screwdriving. The durable material and precise tip machining contribute to longer service life and repeatable results.

Suitable for

• Assembly and disassembly of furniture and fixtures with Pozidriv PZ1 screws
• Electrical and electronic installations requiring small Pozidriv fasteners
• Maintenance and repair tasks where compact bits are needed to reach tight spaces
• Use with bit holders, quick-change chucks, and hand drivers accepting 1/4" hex shanks

Key specifications

• Tip type: Pozidriv (PZ 1)
• Tip length: 25 mm
• Overall length: 25 mm
• Shank style: 1/4" (hexagonal) shank
• Application: Screwdriving for Pozidriv fasteners

How to use

Select the Wera 855/1 BDC SB bit when working with Pozidriv PZ1 screws. Insert the 1/4" hex shank into a compatible bit holder, quick-change chuck, or driver, making sure it seats fully to avoid wobble. Place the Pozidriv tip into the screw recess and apply steady axial pressure while turning the driver. For powered tools, apply controlled speed and torque to prevent damage to the screw head or surrounding material. Inspect the bit tip periodically and replace it if signs of rounding or wear appear.

Lietojuma ieteikumi

Use the bit in the correct Pozidriv screw size to minimize wear. Avoid using a worn or damaged tip on delicate surfaces. When using power drivers, set torque limits appropriate to the screw size and material to prevent over-tightening.