I did the how gold clubs are made. First they put hot wax into a mold then they cut the extra off to just have the wax and they cast mold and put it in liquid ceramic material four times around. It hardens and then they form the shelf. Then the make metal heads from steel bars. They melt it and after five hours then the hammer breaks the mold then they put the shaft on the club and when they make the shaft they use a computer that tells the technician what changes to make make. This was a interesting topic to learn about.