Highlights: High alloy steel body for long life. Materials Cut: Metal, Wood, Plastic. Quick release from mandrel for easy plug removal. Fits any Power Change hole saw mandrel. Positive lock design minimizes wobble. Hex shank pilot bit easily pushes out plug. Heavy-duty hex shank easily snaps into mandrel. Progressor tooth geometry for super-fast cutting action. High speed steel teeth welded to steel body. Aggressive cutting - heat & shatter resistant. Hole Dia: 4-1/2".