I bought this about 1 month ago, not knowing much about chucks, but knew that Grizzly had a good rep for tools. The product came in the proper time and fit perfectly onto my midi lathe. The jaws were easy to reverse. The chuck did not vibrate at all at my lathe's top speed. All in all I was using the product about 30 minutes after it came in the mail. Of course I am retired and was waiting to take it from the delivery person's hands. I was a good purchase and the working of the chuck was very easy.