uxcell 20mm Diameter Tipped Diamond Hole Saw Tile Marble Cutted Product Name : Diamond Core Drill Bit;Tip Diameter : 20mm / 0.787" Shank Diameter : 10mm / 0.394";Shank Length : 24mm / 0.945" Total Length : 76mm / 2.99";Material : Metal Net Weight : 57g Package : 1 x Diamond Core Drill Bit