Which bit type is best for boring large holes in wood?

The most effective bit type for boring large holes in wood is a hole saw. A hole saw consists of a cylindrical saw blade that can cut through wood, creating large-diameter holes needed for applications such as running plumbing or electrical wiring. Its design allows for efficient cutting and the removal of a substantial amount of material, making it well-suited for tasks requiring larger openings.

While other bits like spade bits and bullet bits can also create sizable holes, they are generally more suited for different applications or may not offer the same depth and smoothness of cut as a hole saw. Spade bits are effective for larger holes but might leave rough edges, requiring further finishing work. The three-tooth bit typically does not offer the same capacity for large holes since it's designed more for specific or finer tasks. Thus, the hole saw is the preferred choice for boring out larger holes in wood due to its efficiency and effectiveness.