IRWIN 373412BX 4-1/2-Inch Bi-Metal Hole Saw Review

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• Bi-Metal Construction – for toughness and long life
• Electron Beam Weld – for stronger, longer lasting teeth
• 4/6 Variable Pitch Teeth – for reduced noise and improved performance
• Variable Depth Gullets – provides more efficient chip clearance
• Will cut holes in aluminum, copper, iron, stainless steel and zinc.

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