I just got a great knife at Aquaworld in Cancun. Good price too. Check out the Cressi Sub Totem. There is a nice handle that keeps the knife in the sheath, the rubber circle on the top of the sheath really holds the handle. This knife reminds me of the knife designs of the 1970's. They were large knives held in the sheath by large rubber O rings. I like a knife on my leg, it works for me. I can see it when I need it and I can see it going back in the sheath. Of course in California we wore them on the inside of the leg. If you go to Aquaworld look up this knife.