A spade bit is a drilling bit that has a flat, paddle-like design that helps to create large holes quickly. However, there are other drilling bits that are similar to spade bits that might also come in handy during DIY or construction projects. For instance, twist bits are pointed and spiral-shaped and can bore through both wood and metal with ease. Auger bits, on the other hand, have a corkscrew-like shape and can drill into softwood and hardwood with precision and control. For heavy-duty projects, paddle bits can be used to create larger holes than spade bits and can drill through materials such as plywood, laminates, and composites.