Package Includes:<br />12 x Hole Saw Cutters(a set)<br /><br />Specifications:<br />Material: hard alloy<br />Diameter: 15mm ~ 50mm (15，16，18，20，21，22，25，26，28，30，35，50)<br />Shank Diameter: 9.35mm (± 0.2mm)<br />Length: 70mm(±1~5mm)<br />Suitable thickness: 2-5mm stainless steel plate， within 15mm metal plate<br />Good for: aluminum， steel， wood， plastic materials， gypsum board， stainless steel， etc.<br /><br />Features:<br />1， Hole Saw Cutter before in use， be sure to grasp reasonable， choice， control， tachometer and continuously added to the cooling fluid， in order to prevent edge cracking， such as high-speed gun drill used in the operation should control switch， so opening and closing to minimize its speed， widely used in conjunction with various types of drill hole drilling on the bench.<br />2， Chip smooth， sharp edge， wear and other advantages.