This vice didn't even last six months. One day I was tightening down on a piece of wood when the main screw jumped a thread and my piece of wood fell on the floor. I tried again but the vice would get half-tight and then release abruptly. I unmounted the vice from my bench top and examined it and very quickly found the problem. The proper functioning of the quick release mechanism depended on a stamped out piece of thin metal that was clearly not up to the job. I have another quick release vice that I have been using for 25 years with no problem. This Shop Fox vice, ill-made in China, was not worth a quarter of what I paid for it.