This is a machine with double spindles, and with double Z carriages, and one is SAW FUNCTION. The frame is heavy duty frame, and stronger to work. You can use the doulbe spindles to be a ATC CNC router, one spindle is with different tool, and also can work together, also use the saw to cut, can cut more, and have quick speed to work, this is useful, and make the machine with long life. If you are interested in this machine, please ask me.