I've been using an E-tool afa I can remember..........the first one was the wood handle, where the shovel head folded. Then I moved to the tri fold model.......imo, they are worth their weight in gold, when ya need it and any campsite needs one.......it's the difference between having a nice campsite, with a fire pit, latrine, flood moats, etc and just sleeping on the ground.....and yes, you can sharpen the edges and it be a defensive weapon, but there's other tools for that.