I really like the Osprey Knife & Tool Kiridashi. Great compact size, graceful arcs, and sharp as a razor. It's a beautiful tool. So sharp and pointy that I needed a little something on the blade to keep from cutting myself. Here's a small bamboo guard I made for it. I thought that bamboo was a perfect material for it since it is strong and light, and of course goes well with the Japanese origins of the blade. The guard uses two rare earth magnets to lock the kiridashi in place, with a lanyard hole at the top to hang it from yourself or something else. It just pulls out from the bottom. A keyed set of bamboo ribs assure that the kiridashi cannot push all the way through the top. Since the magnets extend to the back side that means it can also attach to any ferrous surface. I may need to dial down the magnet strength, for the first version over 4 lbs of force is required to pull it out of the guard.