9pcs Bi-metal Hole Saw Set

Inch Size: 3/4:7/8",1-1/8", 1-1/2", 1-3/4", 2-1/4"

Metric Size: 19-22-29-38-44-57mm

Mandrel: 3/8" hex, 7/16" hex

Extension: 12" (300mm) for 7/16" shank

Application: Cutting stainless steel and other materials like pipe, nail-embeded wood, hard wood, plywood and plastics, aluminum etc