Screwdriver Bit Set Wiha 42105

The Wiha 42105 screwdriver bit set contains five 4 mm hex bits, each 29 mm long, designed for precision work and extended durability. Lightweight and compact at 62 g, this set is suitable for a range of fastening tasks and convenient to carry and store.

Advantages

Fluorescent red marking makes bits quick to locate, including in low light when using UV light. Patented torsion zone extends bit life up to 120× compared to Wiha standard bits, reducing replacements and lowering ownership costs. The universal TY bit geometry fits both T-shaped and Y-shaped screws and is compatible with power tools and impact screwdrivers, increasing work efficiency.

Suitable for

• Precision assembly and repair work
• Fastening tasks with T-shaped and Y-shaped screws
• Use with hand drivers, power tools, and impact screwdrivers

Key specifications

• Brand: Wiha
• Model / MPN: 42105
• EAN: 4010995421052
• Bit type: Hex (metric)
• Bit size: 4 mm
• Bit length: 29 mm
• Number of bits: 5
• Set weight: 62 g
• Special features: Fluorescent red marking, patented torsion zone, compatible with power tools and impact screwdrivers

How to use

Select the 4 mm hex bit required and insert it into your screwdriver, bit holder, or compatible power tool. Ensure the bit seats fully in the chuck or driver to avoid slippage. For impact applications, confirm the driver is rated for use with bits that have a torsion zone. After use, store bits in their holder or a suitable compartment to maintain the fluorescent coating and prevent loss.

Usage recommendations

For best results, use the Wiha 42105 bits with properly sized drivers and avoid excessive lateral loads. Use UV light in low-light environments to quickly locate fluorescent-marked bits. Replace bits once wear is visible on the tip to maintain secure screw engagement.