These are made of 22-gauge steel, so you can use them for indoor or outdoor projects.
Brad's Deals Editor Jim,
This AmeriHome Stainless Steel Three-Bucket Set originally listed at $53.99, but we found it on sale for $27.44 at Newegg. Because it ships for free, this is the best price we could find anywhere for the set (there's a cheaper set at Walmart, but you need to spend $50 or more to get free shipping there). Each of the three included buckets measures 9.5" tall and has a 10" diameter. There's no sales tax (except CA, IN, NJ, and TN).