Our types as follows:MD / MDF / MDT / MDS / MDK series used in grinding bore diameter, outer diameter, broach, thread, etc. Our types as follows:MD / MDF / MDT / MDS / MDK series used in grinding bore diameter, outer diameter, broach, thread, etc.XD / XDS / XDJ series used in general parts, carpenter piece, etc.ZD/ ZDS series used in drilling small hole, drilling/milling/chipping machining for ...