Spade bits are a type of drill bit designed for creating large, flat-bottomed holes in wood. They feature a wide, flat blade with a pointed tip that helps guide the bit into the material. Spade bits are commonly used in woodworking and construction for tasks like drilling holes for electrical wiring or plumbing. These bits come in various sizes, allowing users to choose the diameter of the hole they need. While they are effective for softwoods and some hardwoods, they may not be suitable for drilling through metal or masonry. Proper use and technique can enhance their performance and longevity.