uxcell 30mm Diameter Diamond Tipped Tile Glass Hole Saw Drill Bit Product Name : Hole Saw;Material : Metal Cutting Diameter : 30mm / 1.2";Shank Size : 8 x 20mm / 0.3" x 0.79" (D * L) Total Length : 53mm / 2.1";Color : Silver Tone Weight : 32g Package Content : 1 x Hole Saw