Irwin 373418BX 373418BX - BI-MTL 4-1/8" HOLESAW IRWIN

373418BX Boxed Bi-Metal Hole Saw - 4-1/8" (105 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: 4-1/8" (105 mm). Pipe Entrance: 3-1/2". Pipe Tap: NA. Material: Bi-Metal. Recommended RPM (In Steel): 80.