5PCs HSS Drill Bit Hole Saw Set Stainless Steel Metal Alloy 16-30mm Specification: Material:H.S.S Outside Diameter:16mm/0.62'',18mm/0.71'',20mm/0.78'',25mm/0.98'',30mm/1.18'' Length:65mm/2.55''(Approx) Diameter of Shank:9mm/0.35'' Features: Durable and practical Provide 5 Kinds of SIZE H.S.S Hole Saw ,Meet Your Different Needs Perfect for Installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc Cuts Steel, Stainless Steel, Copper, Brass, Aluminum, Fiberglass, Formica And Other Laminates In Seconds Package include: 5 x Different Size Hole Saw 5 x Wrench(As Pictures)