Designed for use with the RIDGID OO-R Ratchet and Handle Assembly, the RIDGID OO-R Alloy Die Head comes with 1/2 in. manual dies and a capacity for cutting clean, precise threads in mere seconds. This is the tool you want for quick, efficient pipe threading. The convenient, factory set 12R RIDGID die head is built for longevity and creates an American Standard National Pipe Thread (NPT) seal that is ideal when cutting threads for mechanical, low-pressure air or fluid applications. The super-efficient OO-R model produces exacting right-hand directional threads on metal pipes that measure up to 1/2 in. NPS, creating clean 14 TPI.