The Alpen-Maykestag 0063300008100 Drill Set for wood is composed of 6 pieces made of high-speed steel cobalt (HSS-CO). It comes in a blister package and is suitable for a wide variety of different applications such as drilling into wood, plastic, and even metal. This set contains various sizes of drill bits, such as 1.0, 1.5, 3.5, 4.5, 8.5 and 12.0 mm. The split point design prevents the bit from wandering while drilling and makes it less likely for the bit to slip. The cobalt steel construction of the drills makes them especially capable of cutting through hard materials and great for tasks such as drilling through stainless steel, as well as drilling for tapping operations on aluminum.