THAT IS STANDERD EQUIPMENT FOR HEAD PORTERS. MIKE HAS WORE OUT 2 OR 3 OF THE GRINDER. HIS SPEED CONTROL LOOK LIKE IT LOST A WAR OR TWO. HE LETS ME PORT ON MY HEADS IN SOME PLACES WHER I CANT HURT THINGS. CLEAN UP THE EYE. WORK ON THE PUSH AND PULL SIDE . THIN THE BLADES AND BALANCE IT.