13Pcs Tooth Kit Drill Bit Hole Saw Set Stainless Steel Metal Alloy 16-53mm<br /><br />Specification:<br />Material:H.S.S<br />Outside Diameter:16mm，18mm，20mm，22mm，25mm，26mm，28mm，30mm，35mm，40mm，45mm，50mm，53mm<br />Diameter of Shnk:10mm/3.93''<br />Length:6