Our Milwaukee Portable Pipe Threading Dies are replacements for: Milwaukee Forged Aluminum Die Heads, Milwaukee Compact Forged Aluminum Die Heads, RIDGID 11-R, 12-R, O-R, 111-R, 00-R, 30A and 31A Threaders, Reed R-12+ Dropheads, DeWalt Pipe Threading Die Heads, and Wheeler Rex 12R Style Die Heads. Offered in Alloy and High-Speed Tool Steel sizes 1/2"-2". Stamped size, type and alignment numbers for easy identification and installation.