Vent Saw; Diameter 4-1/4 Inch; Cutting Depth 2 Inch; Supplied with Arbor Yes; Supplied with Pilot Drill Yes; Pilot Drill Diameter 7/16 Inch; Blade Material Alloy Steel; Cut Material Hard and Soft Wood, Non-Ferrous Material; Application 4 Inch Duct Pipe and Vent Hood Hole