MILWAUKEE Portable Pipe Threading Dies are replacements for: MILWAUKEE Forged Aluminum Die Heads, MILWAUKEE Compact Forged Aluminum Die Heads,RIDGID11-R, 12-R, O-R, 111-R, 00-R, 30A and 31A Threaders, Reed R-12+ Dropheads, DeWalt Pipe Threading DieHeads, and Wheeler Rex 12R Style Die Heads. Offered in Alloy and High-Speed Tool Steel sizes 1/2-2. Milwaukee's High-Speed Dies have the ability to thread Stainless Steel Pipe. Stamped size, type and alignment numbers for easy identification and installation.