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The WIHA 71902 is a Phillips No. 2 screwdriver insert bit designed for use with 6.3 mm hex drive power tool systems and manual bit holders. At 25 mm overall length, this insert bit fits standard 1/4-inch hex quick-change chucks commonly used in cordless drills, impact drivers, and screwdriver handles. It is sized for No. 2 Phillips fasteners found throughout residential and commercial construction, HVAC equipment assembly, electrical panel work, and plumbing fixture installation. Electricians, HVAC technicians, and plumbers reach for this bit format when working in tight spaces or running high-volume fastener tasks on the job site.
This insert bit suits any application requiring a No. 2 Phillips tip in a compact 25 mm format. Typical use cases include equipment service panels, junction box cover screws, sheet metal fasteners on HVAC cabinets and duct fittings, and fixture mounting hardware. The 6.3 mm hex shank seats securely in quick-change bit holders, magnetic extensions, and screw-holding drivers. Sold in a pack of 10, making it a practical choice for stocking service vans or tool cribs where bit replacement is routine.
Designed for use with any 6.3 mm hex drive bit holder, quick-change chuck, or extension accepting standard 25 mm insert bits. Compatible with No. 2 Phillips fasteners across HVAC, electrical, and plumbing applications.
Insert bits are installed and replaced by hand in compatible quick-change or magnetic bit holders — no tools required for bit changes. Ensure the bit is fully seated in the holder before applying torque to avoid cam-out or fastener damage. When using with an impact driver, verify the bit holder is rated for impact use. Replace worn bits promptly, as a damaged tip accelerates fastener head damage.
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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