A drill bit is an attachment used it drills to create circular holes. If you want to fulfill basic requirements, a combination of masonry bits with a high-speed steel twist drill will be efficient for basic usage. Other bits may be required for more sophisticated jobs and materials. Drill bits come in sets of different shapes and sizes, and are generally designed for a specific material or purpose. Most materials can be drilled, but the biggest question when picking a drill bit is what exactly you will be drilling. You can use almost any bit for soft materials, but specially designed drill bits will be required for hard or brittle materials such as acrylic or glass. The amount of polish and finesse you need to have on a project will also affect your choice of bits. Some are fast and cheap, but are a little rough around the edges when drilling, while others are designed to create accurate, clean holes.