I have to say it’s not often I really want to leave a review. The twin gears for my South Bend 16 are ............. awesome!!!!!! The packaging was the best I have ever seen as well. I thought I was opening a plutonium package for Doc Brown in the Back to the Future movie. Amazon has a thing or two to learn. Makes me want to order something else to see how it will arrive. Any way I love the gears the fit is so precise. When this company makes gears to replace the rest of my gear train I will be buying them. My old lathe sounds so precision now. I can still hear the rest of the gears but what an improvement. Only critique is made in China bearings I would pay more for US made. I highly recommend this company and their products based on this first experience. I only wish I had a video showing the before and after.