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The IRWIN IWAF342-4 is a 4-piece hex power screwdriver bit set designed for use with power drivers and impact tools in trade and professional service applications. The set covers hex sizes from 1/4 inch through 7/16 inch, with each bit featuring a magnetic nut setter tip for secure fastener engagement. At 2 inches in overall length, these bits are sized for standard chuck-depth power tools. Licensed electricians, HVAC technicians, plumbers, and general service contractors will find the range of included sizes useful for panel work, equipment installation, and mechanical fastening tasks.
This set is suited for residential and light commercial applications where hex-head fasteners are common. Typical use cases include equipment mounting, electrical enclosure assembly, HVAC unit installation, and sheet metal work. The magnetic tip design helps retain nuts and fasteners during overhead or confined-space work. The set includes 1/4 inch, 5/16 inch, 3/8 inch, and 7/16 inch hex nut setters in a single package.
Designed for use with 1/4-inch hex shank power screwdrivers and impact drivers. Fits standard quick-change bit chucks common to cordless and corded power tools used in electrical, HVAC, plumbing, and general mechanical service work.
Insert bits fully into the tool chuck before operation and confirm the quick-change mechanism is locked. Verify bit size matches the fastener hex dimension before driving to avoid rounding fastener heads. Magnetic nut setters should not be used near sensitive electronic components or magnetism-sensitive equipment without appropriate precautions.
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