Disston Company 521354 Spade Wood Boring Bit 1/2 Inch

Product Description

The DISSTON COMPANY 521354 is a 1/2-inch spade-style wood boring bit designed for fast, clean hole cutting in wood and wood-composite materials. Forged in one piece from special-grade tool steel and heat treated for extra strength, this bit is built to withstand repeated use in demanding job-site conditions. The Micro-Groove point geometry features 38 cutting edges with extended spurs that shear wood fibers cleanly at the perimeter of the hole before the center penetrates, reducing blowout and tear-out. Carpenters, electricians, plumbers, and HVAC technicians reaching for wood boring capacity during rough-in work will find this bit a reliable addition to the kit.

This spade bit is suited for residential and light commercial rough-in drilling applications where 1/2-inch clearance holes are needed through wood framing, joists, studs, or subfloor material. Common uses include running conduit, pipe, cable, and low-voltage wiring through wood structural members. The single-piece forged construction and heat-treated steel make it appropriate for repeated use in production framing and rough-in environments where bit longevity matters.

Key Features

• 1/2-inch cutting diameter for standard rough-in hole sizing
• Micro-Groove point with 38 cutting edges for faster boring action
• Extended spurs shear wood fibers cleanly, reducing tear-out and blowout
• Forged in one piece from special-grade tool steel for structural integrity
• Heat-treated construction for extra strength and extended service life

Compatibility

Designed as a standard 1/2-inch spade bit compatible with any 3/8-inch or larger corded or cordless drill accepting a standard hex or round shank spade bit.

Installation Notes

This bit is installed and operated by carpenters, electricians, plumbers, and HVAC technicians during rough-in phases. Secure the bit firmly in the drill chuck before operation and verify the chuck is fully tightened. Always wear appropriate eye protection when boring. Confirm the work area is clear of embedded fasteners, wiring, or pipe before drilling to prevent bit damage or safety hazards.