Arrived a day early! This grinder works very well. It's small enough to be used for deburring Dremel parts, musical instruments, etc. It is silent and has a variable speed controlled by the power supply. (I think only 7.) Arrived fully assembled and ready to use. It was fairly easy to change out the belts to use a different grit. (Wife even used fine nail dust!) The tilting platform is handy for small knives and has a beveled edge in some places. I rarely use sandpaper or files now. Bought some alumina tapes mainly for metal parts. Good size and power engine. The belt never got tight! Would definitely buy again and recommend to everyone. Nice find, great buy! Note. Nobody has received any compensation for this review.