Bosch Sheet Metal Holesaws - Bosch 2608584797, This Bosch Hole saw for sheet metal has a diameter of 54 mm, 2 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 2608584797 Hole Saw HSS-Co 54mm Metal Power-change & Ejector Spring