Dewalt DW2166 Screwdriver Bit Set 45 Pc 1/4 Inch Drive

Product Description

The DEWALT DW2166 is a 45-piece screwdriver bit set designed for power and manual driving applications in residential and commercial construction, electrical rough-in, plumbing fixture installation, and general trade work. The set covers Square Recess sizes SQ1, SQ2, and SQ3, Phillips sizes 1 through 3, and Slotted sizes 6, 8, and 10, giving tradespeople a wide range of drive profiles in a single organized case. Bits are steel construction and sized for the standard 1/4-inch hex drive found on most cordless and corded power screwdrivers. The full set measures 3.5 inches in overall length per bit and ships in a plastic storage case.

This bit set suits contractors, electricians, plumbers, HVAC technicians, and other tradespeople who need consistent access to multiple drive types on the job. Square Recess drive bits are commonly used in decking, framing, and cabinetry work. Phillips bits cover most fastener-heavy assemblies. The included Slotted bits round out the set for legacy hardware and terminal screws. At 1.28 pounds, the cased set is portable enough for a tool bag or van shelf.

Key Features

• 45-piece set covers Square Recess (SQ1, SQ2, SQ3), Phillips (1 through 3), and Slotted (6, 8, 10) profiles
• 1/4-inch hex drive fits standard power screwdrivers and impact-ready bit holders
• Steel construction for durability across repeated use
• Organized plastic storage case keeps bits sorted and accessible on site
• Compact case at 8.75 inches by 8.75 inches by 1.38 inches for easy storage

Compatibility

Designed for use with any 1/4-inch hex drive power screwdriver, cordless drill/driver, or manual bit holder accepting standard insert bits.

Installation Notes

Select the correct bit profile and size for the fastener head before driving to avoid cam-out or fastener damage. Ensure the bit is fully seated in the driver chuck or bit holder before applying torque. When using with an impact driver, confirm the bits are rated for impact use before sustained high-torque driving. Store bits in the provided case to prevent loss and corrosion.