Short and chubby Screw-machine length drill bits are the shortest standard length drill bits. They get their name from their use in screw machines. When compared to a typical jobber length bit, its reduced flute length and overall length results in a more robust drill bit, reducing deflection and breakage. Stubbies are used for drilling holes with minimal shoulder removal or where only straight, clean holes are needed. Stubbies are made from high carbon steel. The cutting edge should be flat or slightly raised to reduce drag when turning. Stubbies should be cleaned and sharpened before each use. Screw-machine length drill bits range from 6 inches (15 cm) to 10 inches (25 cm) long. Typically three sizes of stubbies are made from one pattern: one size for small holes, one size for medium holes, and one size for large holes. However, some manufacturers make multiple patterns of stubbies for different applications. For example, one set of stubbies may be designed for use in wood while another set is designed for use in metal. Sharpening any type of drill bit will keep it working efficiently longer. Drill bit durability is important because you won't have time to replace them once they've been damaged. If possible, try to avoid applying excessive force when driving a stubbie drill bit into material. This will minimize bending and breaking of the bit.