You need to drill a large hole through a stud or beam for pipe, conduit, or wire run — and your twist bit is burning out, your Forstner won't reach, and the spade bit is walking across the surface before it catches. A spade bit is the right tool for rough framing holes, but only if it starts clean and doesn't walk. 1/2-inch diameter, 16-inch length — reaches through standard wall studs and floor joists without switching to an extended bit. The extra-long length also makes it the right choice for drilling through multiple studs in a run. Spade/speedbor design — fast penetration in wood, less likely to bind than Forstner bits in thick stock. The 16-inch length gives you reach without the flex that causes hole wander on through-cuts. Heat-treated carbon steel — holds up to framing site use be Stocked at Crofton Lumber and Akron Lumber.