The Sanding kit is totally 💯 worth the money, i was able to sand my tumblers in under 2 minutes each, and had i have had to do that by hand, it would have been a minimum of 20 minutes each, if you are considering or even on the fence about buying these, don’t waste another second thinking or another 20 minutes sanding, it will be the best money you spent and you will wonder why you waited or debated