... AND LEVER CAN ACCORDING TO CUSTOMER'S REQUIREMENTS.OPTIONAL WITH FUNCTIONS OR ACCESSORIES, AS FOLLOWS:FULL-WAVE SPEED CONTROL; HALF-WAVE SPEED CONTROL ; DOUBLE SPEED ... , IMPACT DRILLS, ROTARY HAMMERS, JUG SAWS, RECIPROCATING SAWS, SABRE SAWS, ELECTRIC MIXERS, POLISHERS, ORBIT SANDERS ECT. DUSTPRO OF AC TRIGGER SWITCH WITH VARIABLE SPEED