Blue Boar 3-1/2" (89mm) carbide 2-1/4" deep hole saw
89mm 92mm 114mm Bimetal Hex Shank Fire Fighting Galvanized Pipe Tube Metal Steel Plastic Wood Core Drill Bit Hole Saw Cutter - Drill Bit - AliExpress
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
600914 Spyder Tarantula 3 1/2" Inch 89mm Hole Saw Tungsten Carbide-Tipped Non-Arbored Hex 10 for Steel, Wood, Plastics + More
1) NEW 3-1/2"(89MM) Milwaukee Hole Saw Model# 49-56-0190 Made in the USA! | eBay
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