For you safety razor users trying to extend the life of those old double edge blades I have just listed some more of those tiny v-shaped one side, flat on the other hones for the double blades. Some have the instruction papers, some are nothing but the stone. As an additional use, the flat side, I guess, could be used to touch up a straight razor. I just collect em. Never had the "stones" to use a straight razor. Thanks to all of those who have bought from me and helping me dispose of my collection of abt. 600 pieces of razor stuff. My girls are not interested. My e-bay name is the same redrover66. Trying to break the 4,000 feedback mark in the next few weeks.