SK Professional Tools 3/8″ drive, 12 piece, SAE socket set with rail. SuperKrome finish and SuperGrip technology. Backed by SK LIFETIME WARRANTY. Sizes 1/4 through 15/16. Please see pictures for more details, sizes and specs. These are for professionals and advanced hobbyists. I like SK Tools so much I became a distributor. Thank you for looking at Pickles Marketplace item T25128.