THE SWITCH IS SUITABLE FOR APPLIANCE OF CLASS II. ARE WIDELY USE IN ALL KINDS OF HAND HELD MOTOR OPERATED ELECTRIC TOOLS. HT1010 ... ARE WILDELY USE IN ALL KINDS OF HAND HELD MOTOR-OPERATED ELECTRIC TOOLS,SUCH AS:DRILLS, IMPACT DRILLS, ROTARY HAMMERS, JUG ... , ELECTRIC MIXERS, POLISHERS, ORBIT SANDERS ECT. DUSTPRO OF AC TRIGGER SWITCH WITH VARIABLE SPEED