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The WIHA 70540 is a T40 Torx power screwdriver bit designed for use with power drivers and impact-rated screwdriving tools. At 2 inches overall length, this bit fits standard power bit holders and is built from steel for durability under repeated torque loads. The T40 Torx drive size suits larger fasteners commonly found in mechanical assemblies, equipment panels, and structural components. Each package contains 10 bits, making it practical for job-site use where bits are consumed quickly or shared across a crew. The non-magnetic construction suits applications where magnetic attraction to fasteners would interfere with placement or removal.
This bit is suited for HVAC, electrical, and mechanical service work where T40 Torx fasteners appear on equipment covers, mounting brackets, and access panels. The 2-inch length works with most inline and pistol-grip power drivers in common use by trade professionals. With 10 pieces per package, technicians can stock multiple kits across service vans or tool bags without frequent reorder.
Designed as an OEM-style power screwdriver bit for use with standard quarter-inch hex power bit holders and compatible power drivers accepting T40 Torx bits.
Installation of this bit requires a power driver or impact tool with a quarter-inch hex bit holder. Verify that the tool is powered off or the battery is removed before changing bits. Inspect the bit for wear or deformation before each use, as a damaged Torx profile can strip fastener heads. Follow applicable safety standards for power tool operation on the job site.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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