Does anyone have any experience with these folders? They appear to be very thin and lightweight. They come in three models with blade lengths ranging from 2 3/4" to 4" (Hawk, Falcon, and Eagle). I am wondering if they would hold up under moderate to heavy use or whether they should be relegated to occasional light duty. I have never been able to find one in a local store, but will keep looking if I get some favorable comments. Thanks.