Malco HSW68 Vent Saw - 4 1/4-Inch for Cutting Wood and Siding VENT SAW features easily replaceable alloy steel blades and a versatile one piece arbor / mandrel combination made of high grade cast aluminum. The webbed mandrel allows easy plug removal and a built-in arbor eliminates the need for separate arbor attachments. Saw Diameter 4 1/4 in. (108 mm.) Depth of Cut 2 in. (51 mm.)