$59.99 Bosch HTW112 $14.40 1-1/2 Thin Wall Impact Hole Saw, PK5 | Zoro.com
Diablo 3 1/2-Inch Bi-Metal Hole Saw for Wood/Metal Cutting | The Home Depot Canada
Koopi 3-1/2 BI-METAL Hole Saw with Arbor and Replacement Pilot Drill Bit, 89mm Diameter Hole 
