after I put this keyless rotary tool to the test I was impressed with both its speed and precision. As someone in the industrial and scientific fields, i need a tool that can HANDLE tough materials and this one did not disappoint. The rotary feature allowed me to work with more control and the keyless design made changing out bits seamless... The only drawback was that it does tend to make a bit of noise, but it's a small price to pay for such a high-performing tool. Overall, I highly recommend this rotary tool for any industrial task..