Works, makes no noise to indicate imminent self-destruct, and should work well for weekends or light hobbies. You can probably get away with using it in a commercial workshop or manufacturing operation if you understand that such use is basically a disposable tool. This grinder, like most inexpensive pneumatic die grinders, is a replica of an Ingersoll-Rand tool that has been around for almost a century. Clones are so common that even Ingersoll-Rand is selling a Chinese clone as a budget item. All clones are very similar and differ mainly in how much plastic is used, what accessories are included and what kind of warranty service is available. If you buy a clone from Harbor Freight or any of the other big deals, they will usually honor their warranties. Another thing is unnamed instruments sold by temporary sellers. As always, be vigilant.