There are many different types of drills for different types of operations. Work-piece material, tools used to power the tool and the actual result needed can and will influence the type of drill use. Point geometry is also important when selecting a tool. A jobber twist drill is the most common general type within the general types but there are a number of different drill types made for different kinds of operations. Here are some of the different drill types below;

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Heavy-duty drills: Drills subject to severe stresses can be made stronger by such methods as increasing the web thickness. Left hand drills: Standard twist drills can be made as left hand tools. These are used in multiple drill heads where the head design is simplified by allowing the spindle to rotate in different directions. Straight flute drills: Straight flute drills are an extreme case of low helix drills. They are used for drilling brass and sheet metal. Extra-length drills: For deep holes, the standard long drill may not suffice, and a longer bodied drill is required. Step drill: Two or more diameters may be ground on a twist drill to produce a hole with stepped diameters. Carbide-tipped drills: Carbide tips may be used on twist drills to make the edges more wear resistant at higher speeds. Carbide-tipped drills are widely used for hard, abrasive non-metallic materials such as masonry. Three- and four-fluted drills: There are drills with three or four flutes that resemble standard twist drills except that they have no chisel edge. They are used for enlarging holes that have been previously drilled or punched. These drills are used because they give better productivity, accuracy and surface finish than a standard drill would provide on the same job.