Uxcell 20mm Diamond Tipped Drill Bit Ceramic Tile Glass Hole Saw Product Name : Hole Saw;Material : Metal Cutting Diameter : 20mm / 0.78inch;Shaft Size : 6.5 x 20mm / 0.25inch x 0.78inch (D L) Shaft Hole Dia : 4mm/ 0.16inch;Side Hole Size : 12 x 5mm/ 0.4inch x 0.2inch(LW) Total Length : 47mm / 1.8inch;Color : Silver Tone Weight : 15g;Package Content : 1 x Hole Saw