Step drill / cone cutter / drill bits 3pc set / kit 4mm - 32mm AT321

Professional tools for commercial or occasional use. <br><br> Step drills offer a significant advantage over cone drills because they offer a positive stop when a hole reaches a certain size. <br><br> With a cone drill it is easy for it to dig in and make a hole that is too large. <br><br> A set of 3 step drills / stepped cone cutters. <br><br> Cuts a perfectly round hole in sheet metal. <br><br> SET Includes; <br><br> Small Drill; 4mm, 6mm, 8mm, 10mm and 12mm. <br><br> Medium Drill; 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm and 22mm. <br><br> Large Drill; 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm and 32mm. <br><br> Ideal for thin metals such as steel aluminium, copper, fiberglass, brass and PVC etc... <br><br> Fully polishing HSS steel, self starting design. <br><br> Double flutes make a perfectly round hole and automatically deburr as you drill. <br><br> Complete in metal tin / case for easy storage and transportation <br><br>