These innovative step drills have been designed for use with Maxbor mag based drills. The unique design allows a number of popular hole sizes to be drilled with the one tool. These step drills offer a number of advantages over conventional drilling and cutting methods and can be used for many different industrial applications. 5 sizes are available for drilling from 8 to 48mm holes. General Engineering and Metal Fabrication. Bridge and Highway maintenance. Truck and Trailer manufacturing. Construction and Railways. Ship Building and Offshore Rigs. Elevator Repair. Maximum material thickness – 12mm.