ATOPLEE 10pcs 6mm-30mm Diameter Dia Diamond Coated Drill Bit Marble Tile Glass Drill Can drill 8mm depth. Size(outside diameter):6mm,8mm,10mm,12mm,15mm,16mm,18mm,20mm,22mm,30mm Shank length :50mm,18mm,20mm,20mm,20mm,20mm,20mm,22mm,25mm,25mm Package Included: 10 x Diamond Coated Hole Saw Drill Bits