Screwdriver Bit Set Wiha 42130

The Wiha 42130 screwdriver bit set contains five Torx T20 bits, each 49 mm long with a 1/4" (25.4 / 4 mm) shank. Designed to simplify bit selection, these bits follow Wiha's universal TY concept that makes the screw head shape the only criterion for choice. The bits are suitable for use with hand screwdrivers, power tools and impact drivers and are intended for fastening tasks in a wide range of materials.

Advantages

These Wiha bits combine a patented torsion zone that increases durability and allows use with impact screwdrivers, a fluorescent coloured coating for quick identification (including under UV light), and a long service life — up to 120 times the lifespan of Wiha standard bits. The uniform shank size ensures compatibility with common 1/4" holders and bit sockets.

Suitable for

Key specifications

How to use

Select a T20 bit from the set and insert its 1/4" shank into a compatible screwdriver, bit holder or impact driver. Position the bit in the screw head and apply steady axial pressure while turning the tool at the recommended speed for the screw and material. The torsion zone allows safe use with impact settings, reducing stress on the bit during high-torque operations.

Recommendations

For longest service life, match the T20 bit precisely to the screw head, avoid excessive lateral force, and store bits in a protected case. Use appropriate torque settings on power tools and inspect bits for wear before impact driving.