Hole Saws Thick Cup Bi-Metal 4 1/2"Sold in sets of 1 Cuts through steel, wood, plastic, stainless steel, and cast iron. Rugged cobalt bi metal construction for maximum longevity. Deep cup cuts through studs in one pass. Variable pitch teeth cut faster and smoother while reducing chatter. Longer lasting design for more cuts per saw . Multiple knock out slots and holes for easy core removal. Note: Set pilot drill point 1 8'' (3 mm) beyond toothpoints.
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