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The WIHA 74340 is a steel power screwdriver bit designed for use with power tools and impact drivers in professional trade applications. At 2 inches overall length with a standard hex drive measuring 4 millimeters, this bit fits commonly used quick-change chucks found on cordless and corded power drivers. The non-magnetic construction suits applications where magnetic interference is a concern. Each package contains 10 bits, making it a practical supply for ongoing job site use. Licensed electricians, HVAC technicians, plumbers, and general contractors rely on this type of bit for repetitive fastening tasks in tight or open installation environments.
This bit is suited for residential and light commercial installation work where a 2-inch overall length provides clearance without excessive extension. Typical applications include panel box assembly, fixture mounting, equipment installation, and structural fastening. The 4-millimeter hex shank seats securely in standard bit holders and quick-release chucks. The 10-piece pack format supports tool bags, service vans, and bench kits where bit wear and replacement are routine considerations.
Designed for use with power drivers and impact tools accepting a 4-millimeter standard hex shank bit. Fits quick-change and standard bit holders commonly found on cordless drills and power screwdrivers used in electrical, HVAC, plumbing, and general construction trades.
Insert the bit fully into the chuck or quick-release holder before operating the power tool. Inspect bits for wear or deformation before each use, as damaged bits can strip fastener heads and cause injury. Follow the tool manufacturer torque and speed settings appropriate for the fastener and material being driven. Bits should be stored dry to prevent corrosion and maintain fit in the chuck.
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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