Irwin 373412BX 373412BX - BI-MTL 4-1/2" HOLESAW IRWIN

373412BX Boxed Bi-Metal Hole Saw - 4-1/2" (114 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: 4-1/2" (114 mm). Pipe Entrance: NA. Pipe Tap: 4-1/2". Material: Bi-Metal. Recommended RPM (In Steel): 70.