Bosch Sheet Metal Holesaws - Bosch 2608584807, This Bosch Hole saw for sheet metal has a diameter of 79 mm, 3 1/8in.
, and is designed for use with a power-change arbour.
The saw has an ejector spring to aid the removal of cut material.
Bosch 2608584807 Hole Saw HSS-Co 79mm Metal Power-change & Ejector Spring