Malco Vent Saw 
Designed for cutting all types of hard and soft wood, and other non-ferrous materials including plywood, composition board and siding.
The Malco VENT SAW™ is indispensable when fitting fresh air intakes through foundation plates, exterior siding or facing materials encountered in residential or light commercial installations of gas or oil fired furnaces.
VENT SAW™ features easily replaceable alloy steel blades and a versatile one piece cast aluminum arbor/mandrel combination with a 7/16” (11.1 mm) pilot drill. The webbed mandrel allows easy plug removal and a built-in arbor eliminates the need for separate arbor attachments.