3-1/2" - 89mm Bi-Metal Holesaw 4420898 Chipping or mushroom head is

Chipping or mushroom head is avoided by special security impact head

Sound level: 88

With cutting edges (hardness approx

Spiralux Spiralux 6mm Nose Bush Mandrel

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3-1/2" - 89mm Bi-Metal Holesaw 4420898 Chipping or mushroom head isStarrett Holesaws. Constant Pitch up to 40mm Dual Pitch Professional Hole Saws 41mm and over are the latest development in multi use bi metal hole saws. Featuring the smooth cutting action of our constant pitch hole saw, combined with aggressive material penetration and swarf clearance, Dual Pitch Professional will cut equally well on thin and thicker gauge materials. This removes the need to carry a constant and a variable pitch hole saw. Advantages: