Bosch Sheet Metal Holesaws - Bosch 2608584794, This Bosch Hole saw for sheet metal has a diameter of 44 mm, 1 3/4in.
, and is designed for use with a power-change arbour.
The saw has an ejector spring to aid the removal of cut material.
Bosch 2608584794 Hole Saw HSS-Co 44mm Metal Power-change & Ejector Spring