Considering the prices for top-level golf clubs it should come as no surprise that there is a thriving industry in making club heads that provide capabilities similar to those made by the major manufacturers. There are even a few somewhat questionable companies that are in the business of creating "clones" of most popular heads. There's more to making a useable club than just plopping a head on a shaft, so you'll need to learn how to make a balanced club if you want to have a positive impact on your game.