I junked an "explorer" that i bought at a flea market and put the corkscrew on my 3 1/4" tinker.I gently pried the handles off, filed off the end of the brass pin, punched it out, switched tools, then using the longer pin from the donor knife put it back together, peening the end of the pin and "shoegooing" the handles back on. I was very bored that day. I've used it quite a few times and it hasnt loosened.I mostly wanted to store the tiny screwdriver. good luck