This die grinder I bought is actually one of the best I've ever bought. The composite case is very light and holds up well to use, and one of the main reasons I like it so much is that it doesn't get as cold in use as metal cases. Another reason I like it is that the grinder is quieter than others I've used in the past because there are other techniques close to me that are so loud they almost deafen you. If you work in a shop then you really know how loud it can get, bang to bang, loud air hammers etc. By the time your career is over you will be almost deaf due to almost no hearing which has a noticeable noise difference , is definitely worth the investment. Yes you can wear hearing protection but it still doesn't work very well. A few things to talk about about the coffee grinder is the switch it has as it is very unique, something you see all too often when there is no safety. Lever to fold back to work. It's a lot quicker than putting the lever back and pushing it, but you're probably thinking that's an extra 5 seconds, but trust me, the feel of the hand holding this coffee grinder makes a big and noticeable difference. When I bought this coffee grinder I thought the lever would break in a few months but after being dropped and thrown it held up pretty well and hasn't broken yet. I haven't found any other brand like this with such a unique feature. Power is another strong point of this straight grinder and it doesn't let up under pressure. For example, if you use a cutting disc, even with strong pressure, it will not slow down or even stop. The disc will break before so it's good to have some with more torque as I've used others, even with a little nudge it stops and you have to release the pressure before it can continue. All in all, a lot of power for something very small. It comes with two collet wrenches for removing and tightening, but they are very small but strong. I mostly use regular wrenches because they are too small. Along with other reviews it's really handy to have a swivel at the base where you attach the air hose which actually makes it easier to hold and comfort. move because they often turn and move. I actually used one for a few months but I went through 3 of them and it all started leaking air into the joints. Probably because they were cheap I just converted them back to a standard 1/4 adapter. If you are planning to buy one, buy one of good quality as you will only be replacing it. Otherwise, the price was very cheap and is still strong after a year of almost daily use. If you're going to buy a new device, don't hesitate to stop shopping because I think you've found it. I have several Aircat products and this one is no exception.