These are Soviet bloc can openers (I believe they are Bulgarian, but am not completely sure) that work a lot like the WWII German ones. These are very heavy duty and slightly safer to transport in a pocket as the cutter almost completely hides away. The only marking is an M in a circle. Price is for one. These are surplus in generally good condition but, like most soviet things, you will have to clean off a lot of cosmoline. It measures just under 4" long.