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The Bosch Screwdriver Bit Extra Hard set contains 25 Torx T40 bits, each 25 mm long with a 1/4" (6.35 mm) hexagonal shank. Supplied in a compact box, these extra hard bits are designed for compatibility with a wide range of screwdrivers and drivers used in professional and DIY work.

Advantages

The tapered torsion zone absorbs torque peaks to reduce breakage and improve bit life. Extra-hard material provides wear resistance and maintains tip geometry for consistent engagement with Torx T40 screws. The standardized 1/4" hex shank ensures secure fit in common chucks and bit holders.

Suitable for

Key specifications

How to use

Select a Torx T40 bit from the box and insert the 1/4" hex shank into the screwdriver or power driver chuck. Use steady pressure and align the bit with the screw head to avoid cam-out. For power drivers, use controlled speed and torque settings appropriate for the screw and work material.

Recommendations

Store bits in the provided box to protect tips from damage. Replace worn or deformed bits to maintain secure engagement with Torx screws and reduce risk of screwdriver or fastener damage.