The price of this small sander is quite high considering the cheap base price. We run a factory and use a lot of electric and pneumatic tools. It works, but there is a caveat. The mechanism is very rigid and needs a lot of air to spin to the desired speed. When the part breaks it feels better, but it still seems to waste a lot of air. Be sure to lubricate with good quality air tool oil during break-in and daily. like that . These are budget tools that offer decent performance. not sure how long