BE CAREFUL IN BUYING THESE MACH 3 POWER BLADES MOST OF THEM ARE CRAP,E MAIL FIRST ASK IF GENUINE,TRY TO LOOK AT THE TOP CORNER OF THE PACKET IT SHOULD SAY NEW,I HAD ONES THAT SAID NEW BUT ALSO NEOUVU OR SOMETHING LIKE THAT,DONT KNOW IF IT HAD ANYTHING TO DO WITH IT BUT THEY WERE REALLY CRAP BLADES,ALSO THERE WAS NO ENGLISH WRITING ON THE BACK OF THE PACKET,JUST BE CAREFUL NOT TO GET RIPPED,ANYWAY ALL THE BEST HOPE THIS HELPS YOU, LEE THOMPSON..