2-1/8'' 54mm Metal Steel Alloy Hole Saw Tooth Carbide Tip TCT Drill Bit Cutter | eBay
Amazon.com: 2-1/8 Inch Hole Saw, 54mm Hss Bi-Metal Hole Cutter for Recessed Lights, 30mm Cutting Depth Hole Drill Bit with Hex Shank for Wood Boards, Soft Metal Sheet, Drywall and Plastic, Red :
Segomo Tools 16 Piece General Purpose Bi-Metal Hole Saw Kit (3/4 Inch