1、WIDELY USED: Very suitable for home maintenance and light work, such as drilling on plastic, aluminum, copper, iron and many other types of plates(excluding steel or any other harder metal) 2、DURABLE COATING: Made of HSS and coated with Ti to ensure the durability of the step drill. This also tests the ability and durability of the drill bit to drill multiple times on plastic, aluminum, copper, stainless steel and other surfaces 3、FAST DRILLING: The improved design provides less pressure, making the drilling faster and more smooth. The stepped drill can be used for holes of various sizes. High step design makes you stop, don't drill too big 4、EFFICIENT DOUBLE FLUTE: Hex shank Ti drill adopts double flute design, which makes the cutting more smooth, improves the self centering cutting speed, eliminates the use of center punch, and not easy to break compared with ordinary drills 5、EXCELLENT PERFORMANCE: Made with fine workmanship, possess compact appearance and stable performance, can make sure durability and stability Item Type: Step Drill Bit Material: HSS Surface Treatment: Ti plating Shank Diameter: Approx. 6mm / 0.24in Scope of Application: Suitable for workpieces with hardness below 25, such as thin iron plate, insulating plate and wood plate 1 x 6 Steps Drill Bit 3/16-1/2in 1 x 9 Steps Drill Bit 1/4-3/4in 1 x 13 Steps Drill Bit 1/8-1/2in