<p>To perform best results of Dremel 118 High Speed Cutter, Dremel recommend users:</p><p>The Dremel 118 High Speed Cutter is a versatile, high-quality cutter made of high-grade steel for use on <b>wood, plastic and soft metals.</b></p><p>The Dremel 118 High Speed Cutter is ideal for<b> shaping, hollowing, grooving, slotting, inlaying and making tapered holes.</b> For use in soft metals, plastics and woods<b> especially on curved surfaces</b>. Use the sides of the cutter (Rather than the tip) for effective cutting. Great especially on curved surfaces.</p><div>Technical Specifications:</div>• Shank diameter: 3.2 mm<br>• Working diameter: 3.2 mm<br>• Accessory length: 38.0 mm<br>• Maximum RPM: 30,000 1/min<br>• Maximum speed setting to be used: 30,000 1/min<br><br><div><b>Recommended speed</b></div><div>Aluminum 30.000<br>Brass 30.000<br>Copper 30.000<br>Hardwood 35.000<br>Softwood 20-25.000<br>Plastic 35.000<br>Steel 20-25.000</div>