Precision Durability for EasyRepairs! These high-quality threading dies for NPT1/2 to 3/4-inch pipes are made from durable HSS steel. Compatiblewith RIDGID universal die heads and VEVOR split-type machines,these pipe threading dies ensure sharp, accurate threads. Simplyinstall them by following the numbered sequence. These NPT pipe dies offer steady cuttingperformance even under high speeds and loads, ensuring consistentand reliable results for every task. These pipe threading dies are compatiblewith RIDGID universal die heads and VEVOR split-type machines,including models like RIDGID 504A, 711, 713, 811A, 815A, 816, 817,and 842, providing flexibility and reducing equipment costs. Features clear, easy-to-read markings foreasy installation. Follow the numbered sequence to install themetal threading dies quickly and accurately, reducing the chance oferrors. Installing these replacement dies forpipe threading is quick and simple - just three moves. Just insertthem in the machine following the numbers - no complicatedsteps!