The DHS680 is the first brushless circular saw from Makita offering a brand new brushless motor and some new in-built features. Its brushless motor allows for high efficiency of battery power, as well as less damage to be caused to the other parts of the saw through contact with brushes. The saws new "Automatic Speed Control" feature allows the computer chip built into the saw to determine the most efficient cutting speed for the specific job, making sure you get the most out of your saw, blade and battery.