The Ronix RH-5901 Step Drill Bit is not just versatile and durable but also highly efficient. Its unique design allows you to drill multiple hole sizes with just one bit, saving both time and money. The step design of the bit gradually increases in diameter, making it ideal for creating holes of different sizes without having to switch between bits. In addition to its efficiency, the Ronix RH-5901 Step Drill Bit is made of high-quality HSS materials that make it long-lasting and reliable. You can use it on a range of materials including steel, stainless steel, copper, aluminum sheets, and more. Its maximum material thickness of 4mm makes it perfect for thinner materials.