Sorry, this review will not provide you feedback on shaving. I've been using these blades for scoring my loafs of bread. It slices through the dough like butter. I've read other comments where people had a hard time breaking the small plastic boxes open. There is no need to break the plastic box, you just need to flip the box upside down and slide out the paper cover, then the blades through the small crack (opening) on the side with your finger.