Companys like ACT, Execy, OS giken ORC ect. have there stuff made in house and have been perfected though trial and error. where as you are getting them from a supplier somewhere in china which has been put together in a sweat shop. My ACT 6 puck clutch, release bearing and alignment tools was $410 plus shipping and Import tax which is a bargain. (RX8) I bought it because it's a trusted and well known brand which loads of people can recommend. I personally wouldn't trust this in my car.