Professional-grade RIDGID pipe threading die chasers in various sizes. This collection includes High Speed Steel and Alloy sets for NPT and NPSM threading. Sizes include 1/8", 1/4", 1/2", 3/4", 1", 1-1/2", and 2". Each set contains four individual chasers designed for use in drop head threaders. The components are made of durable steel and come in their original protective plastic packaging. Message me here or text me if you have any questions and I'll do my best to answer, I'm not an expert, just trying to help settle an estate.