I love these little blades. I load three or four onto a mandrel and polish! It's just magical what they can make out of copper and brass in a matter of minutes. I use it for my first polish and then move up to 1 micron (although sometimes I don't have to). They are also quite durable. I use them until about 1/3 or more of the length of the stubble is gone. They're not cheap, but you get what you pay for. However, these are the best prices I've found.