It took me 25 years, but I managed to wear out a Buck 301 stockman I bought at an army PX in 1970. I was serving in the army engineers and that pocket knife got used on construction sites in the U.S., Germany, England, Libya at the old Wheelus Air Force base in Pre-Gadafi times. Then it went on to serve in the machine shop until the mid 1990's. By that time the main clip blade and sheepsfoot blade where worn down to toothpicks, springs were worn out tot he point a 4 year old coulee open the knife.