Bosch 2608584778 - 16 mm Sheet Metal Hole Saw has cutting quality depending upon the correct speed and the type of coolant used within the system. Bosch Sheet Metal Hole Saw has variable tooth pitch for fast, precise cutting in metal sheet. It has saws for fast cutting in metal sheet. There is a depth stop that prevents breakthrough from protecting unnecessary accidents. HSS Bi-metal with 8 % cobalt is used for extending the lifetime of the device.