Don't know if I'm breaking some rules but here goes: I'm new to ball stretching and went to buy a few two-piece rings and was shocked at the price (some over $200). Did some research and it turns out they're actually a transmission part you can get for less that $10 at a distributor. You can search: Two Piece Clamp-Type Shaft Collars, they come in every size and metal imaginable and you can save yourself some serious $$. It took me a while to find a consumer friendly distributor, here is one: DECO Tool Supply Company deco.dreamscape.com Good luck. Great site.