5 Pcs Tile Hole Cutter Set For Porcelain Ceramic Tile Marble Granite 25/35/40/50/68mm Diamond Hole Saw Drill Bit Set ,Strong Suction Force

Start drilling as per following instructions: Place the drill at a 45 degree angle. Drilling till the hole start to form. Bring the drill up into upright position. Continue to drill and swaying the machine along a circle.