Review on Enhance Timekeeping and Maintenance with Brass Blessing: 10-Size Solid Brass Clock Winding Keys - Includes Both Odd & Even Sizes 2 to 11 (5025) by John Finley

I haven't heard from my grandparents watch for over 20 years because the key to their winding mechanism was lost. I had no idea about the key size or how to measure it. This multi-dimensional key meant I could customize both the horn and time slots perfectly. As the seller warned, delivery took some time but it was worth the wait. Once I found the right size, I was able to wind the watch and it ticked the perfect time every fifteen minutes. A sound from my childhood that I never thought I would hear again!