Irwin 373400BX 373400BX - BI-MTL 4" HOLESAW IRWIN

373400BX Boxed Bi-Metal Hole Saw - 4" (102 mm) Diameter. Variable depth gullets provide more efficient chip clearance. 4/6 Variable pitch teeth for reduced noise and improved performance. Electron beam weld for stronger, longer lasting teeth. Bi-metal construction for toughness and long life. Cutting Diameter: 4" (102 mm). Pipe Entrance: NA. Pipe Tap: NA. Material: Bi-Metal. Recommended RPM (In Steel): 80.