4-1/4 M.K. Morse Bi-Metal Hole Saw (177689)

4-1/4 Diameter
3-1/2 Pipe Tap
80 Recommended RPM

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

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