Could have sworn my little belt sander was variable, but it isn't. It's a small stationary upright sander. It did work quite well on the scrap I tried, but I will have to be very careful not to twist the band of leather. I'm only trying to remove some of the suede off the backside, so once I've cut my strips, and exercise patience I should be fine. May also use the smaller of the two welt cords, it provides a slightly less bulky look.