The U-drill is a tool for drilling holes with a combination of a centre insert (inner edge) and a peripheral insert (outer edge).  the U-drill inserts have chip breakers for various materials, which are suitable for different materials, and the series of diameter specifications from 2D to 6D can be combined with hundreds of tool forms, which can meet more than 80% of the drilling processing requirements.

 U-drill inserts do not need to be resharpened, the form of discarded inserts to change the tool is convenient; the size of the drilled holes is easy to control and uniform; reduce the time of tool change and tool setting. Because there is no need for resharpening, when choosing a U-drill shank, the rigidity of the shank can be selected to give full play to the high performance characteristics of the U-drill.