The dewalt industrial rugged holesaws are designed for heavy duty cutting in standard or deep cut applications the bi metal deep cut holesaws feature the following quick release mandrel prevents lock up of the holesaw on the mandrel enabling easy removal extra hard variable pitch high speed steel teeth m3 steel cutting edge providing extended holesaw life performance benefit longer life as a result of sharp long life teeth and a flexible strong body 125 mm deeper cut than standard bi metal h