These knives are cheap as mentioned in the other reviews. I used one to cut open a plastic container and the back of the knife broke when i was cutting it. It's kind of a joke how non durable these knives are.The locking feature for most of the knives sticks, so trying to get the knives close can be a hastle.One pro is that these knives are very cheap and there is no feeling bad if you loose it or throw it away. They do have sharp blades on most of them, but i'm not sure how quick they wear down or break. Good for dirty jobs that you don't want to get a $50 knife messed up. Just make sure to bring more than one incase one breaks.