uxcell 20mm 3/4" Diamond Coated Tool Drill Bit Hole Saw Marble Glass Tile Product Name : Diamond Hole Saw;Material : Metal Cutting Diameter : 20mm / 0.8";Shaft Size : 8 x 25mm / 0.3" x 1"(Diamter* L) Shaft Hole Dia : 4.7mm/ 0.185";Side Hole Dia : 6mm / 0.24" Total Length : 50mm/ 2";Color : Silver Tone Weight : 20g;Package Content : 1 x Diamond Hole Saw