Set of step drills, 3 pcs, Ronix RH-5903

The step design allows drilling holes of different diameters with a single drill bit Step drill with two flutes for drilling steel, stainless steel, copper, and aluminum sheets Made from high-speed steel with titanium coating for greater strength and durability Three-flat shank prevents slipping in the drill chuck Various drill sizes: 4–12 mm; 4–20 mm; 4–32 mm Speed Point tip for quick penetration and prevention of drill bit wobble Includes a three-piece spiral drill with a metal case