Sandhog Fast drill tool mainly divided into SDA/MDR series.the drill body adopts post-fire processing technology with good strength.we have two kinds of drilling depth：2 D and 3 D diameter.there are three kinds of U drills,which are related with SOMT.SPMT and WCMT insert.the diameter of theU drill is from 12.5mm to 45mm and double coolant hole to get good internal cooling effect.