Review on 💪 Collet Grinder Compressor - Straight and Efficient by Flex Graham

When I bought this tool I also ordered this one: https://www.amazon.com/gp/product/B07DBZ5PDT/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 It may seem trivial, but the mandrel doesn't fit Collets I Place a micrometer on the shaft: .2499. I used gauge pins on collets: .240. I think I could hit him with a hammer. Is that the Chinese way?