THE SWITCH IS SUITABLE FOR APPLIANCE OF CLASS II. ARE WIDELY USE ... FEED BACK; ON-OFF VERSION; SPEED LIMITED IN FORWARD OR REVERSE; PASSIVE LINEAR POTENTIOMETER; DIAL WHEEL FOR PRE-SET SPEED SETTING ... HELD MOTOR-OPERATED ELECTRIC TOOLS,SUCH AS:DRILLS, IMPACT DRILLS, ROTARY HAMMERS, JUG SAWS, RECIPROCATING SAWS, SABRE SAWS, ELECTRIC MIXERS, POLISHERS ...