As a result of my tests, I determined that these mandrels are a great value for their price. They work smoothly and flawlessly, providing professional results every time. They are also very easy to install and use .The only downside is that it may take a bit of practice to get the hang of using them effectively, but once you do, you'll be very satisfied with the results. Overall I highly recommend these mandrels for anyone in the Industrial and Scientific field looking for a reliable tool for cuSee full review