Genuine RIDGID 12-R replacement pipe dies in multiple sizes. This set has two 1-1/4" packs, one 3/8" pack, three 1/4" packs, and four 1/8" packs. Each set is made of steel and is compatible with 00-R, 111-R, 0-R, 11-R, and 30-A threaders depending on the specific size. Message me here or text me if you have any questions, I'll do my best to answer, just trying to help settle an estate