I bought the Scuba Max KN100 knife at my local dive shop. Cost was 35.00. I liked it because it fit on my BCD webbing. Cool look. My first time out with it I lost it, I was bottom diving in the mud and I got wrapped up in the flag rope so maybe it was my fault. I called Scuba Max and complained the sheath is of a faulty design and they convinced me it was my fault. They suggested I did not push the knife completely into the sheath. OK, I bought another one. I had a problem with my BC and I was on the surface banging around on the rocks and the knife fell out again. I emailed Scuba Max and told then I have lost 2 of their knives on the 1st or 2nd journey out, and I am sure the sheath design is faulty. I have not heard from them and I don't expect to. I told them I would send them 2 empty, brand new sheaths if they did not believe me. I would like some from of compensation and I would like them to fix the design. Has anyone else had a problem with this knife? A knife is a very important tool in the underwater environment and I don't think cheap sheath design should be legal. I am not saying that Scuba Max is a bad company I just want to know if anyone else had this problem.