The Kilews models SK-2205LS, SK-2215LS, SK-2225LS, SK-2235LS, SK-2245LS, and SK-2225LSF are semi-automatic clutch type electric screwdrivers. The screwdriver has an AC brush type motor. It does not require an adapter. It is light weight, ergonomically designed, handy and easy to use. It boosts productivity. Power ONOFF with a trigger switch.It provides precise torque to ensure proper tightening of screws.