Step Drill Bit ST-4-39/3 HSS (13 Steps) EKF

Step drills are used for fast and low-noise drilling of large diameter holes in sheet materials—metal and plastic—using hand electric or cordless tools. In electrical installation, they are convenient to use when drilling holes for signal lamps, switches, glands, etc. The assortment includes even and odd series for various types of work. Made of high-speed steel, alloyed with cobalt to increase wear resistance. When drilling, a chamfer is removed immediately—no additional edge processing is required.