Irwin 1882788 Speedbor No. 8 Countersink Replacement Bit 6pk

Product Description

The IRWIN INDUSTRIAL TOOL CO 1882788 is a Speedbor countersink replacement bit designed for drilling clean, fast pilot holes in wood. The tapered drill body features widened flutes that pull chips away from the cut for a faster, smoother bore. An adjustable 4-cutter counter bore clears chips quickly and can be repositioned on the shank flats using two hex screws, giving the installer precise control over pilot hole depth. The 0.25-inch quick-change shank reduces slipping in standard chucks and is compatible with all 0.25-inch quick-change chuck systems. Sized for No. 8 screws, it ensures a tight, flush-seated fastener every time.

This bit is suited for finish carpentry, cabinet installation, deck framing, and general wood assembly where countersunk pilot holes are required. The quick-change shank design makes it compatible with impact drills, which speeds up production work on job sites. The adjustable counter bore allows the same bit to serve multiple screw-length applications without retooling. Sold in a 6-pack, this SKU is intended for shop stock, tool crib replenishment, or multi-tech crew supply. A licensed carpenter, finish carpenter, or experienced woodworker would typically install and service this type of bit.

Key Features

• Tapered drill with widened flutes for fast, clean pilot holes sized for No. 8 wood screws
• Adjustable 4-cutter counter bore clears chips quickly for smooth countersinking
• Counter bore locks to shank flats with two hex screws for a secure, depth-adjustable fit
• 0.25-inch quick-change shank compatible with all 0.25-inch quick-change chuck systems including impact drills
• Reduces slipping in standard chucks due to quick-change shank geometry
• Sold as a 6-pack for shop stock or crew replenishment

Compatibility

Compatible with all 0.25-inch quick-change chucks, including impact drills. Designed for use with No. 8 wood screws in standard wood drilling applications.

Installation Notes

Always ensure the drill or impact driver is powered off and unplugged before installing or adjusting the bit. Use the supplied hex screws to secure the counter bore to the shank flats before drilling. Set pilot hole depth on scrap material before committing to finish work. Follow applicable workplace safety standards when operating rotary cutting tools.