Starrett Bi-Metal Deep Cut Hole Saw with Abrasion Resistant HSS Teeth - Ideal for Cutting Metal, Steel, and Wood - 2-5/8" (67mm) Diameter, 2" Depth -DCH0258-G: Amazon.com: Tools & Home Improvement
8PCS 67mm 76mm 89mm 102mm 127mm Bi-Metal Positioner Hole Saw Set for Metal Iron Stainless Steel - China Core Drill Bit, Metal Hole Saw Cutter | Made-in-China.com
Hitachi Bi-Metal Hole Saw 60310132 67mm | eBay
Hole Saw Metal Bimetal | Bimetal Hole Cutting Saw | Metal Hole Saw Holesaw - 9pcs Kit - Aliexpress