... for comfrt grip,6,Nail machine stand inclued, 7,Foot pedal for easy operation . Nail art polishing drill ... art polishing drill machine pedal switch to the FOOT S/W socket.3,Select grinding mould of ... Nail art polishing drill machine is pressed to FOOT,step on the pedal the speed will be acceleerated, ... and loose the foot,the speed will decrease(foot switch is optional)4,The turning ...