Dremel SpeedClic starter kit, comes with 1 mandrel and 2 cutting discs made of a hard abrasive with a diameter of 38 mm and a thickness of 1.6 mm. USES The Dremel SpeedClic makes accessory changes easy as PULL - TWIST - RELEASE. The one-piece mandrel design simplifies the process of changing cutting wheels and makes it easy to cut through metal. Ideal for cutting, grooving and trimming all kinds of materials—including metal, wood and ceramics. You can use it to cut screws and rusted bolts, make slots in screw heads, trim castings and more. TIPS Secure objects to a stable surface while working. Hold the tool so that the wheel is at a perpendicular angle to the material being cut. Keep a light touch, as the wheel will break under too much pressure. If chattering occurs, increase speed. Plastics require very slow speeds, because they tend to melt at the contact point.