based on my experience this mandrel is a game-changer in my industrial and scientific work. It is versatile and reliable for my hole saws and accessories, making my work faster and more efficient.The mandrel is built to last, making it a worthy investment for long-term use. One potential drawback is that the instructions may not be clear for beginners, but with a little research, it becomes easy to use. Overall, I highly recommend this mandrel to anyone looking for a quality cutting tool accessory..