performance This tool uses quality BSPT threads that stay clean and resist slipping, saving time and effort. It helps you cut clean and accurate threads on pipes and provides a reliable waterproof seal. Careful design Chip removal holes in each die head prevent clogging and keep operation smooth. It also supports switching between positive and negative electrodes by pulling out the knob and rotating it in the opposite direction. Built to last Constructed with quality cast iron, 45# steel, and plastic components, plus zinc plating, plastic spraying, and an electrophoresis finish to enhance durability and long service life. Complete kit Includes four die heads in sizes 1/2', 3/4', 1', and 11/4' and a ratchet to meet different threading needs. Lets you thread pipes by yourself without the need for a professional plumber. Use scenarios Home plumbing repairs to damaged pipe threads on water supply lines. DIY projects such as installing or repairing irrigation lines or adding fixtures. Onsite piping work in tight spaces, such as in caravans, boats, or renovation sites where carrying a professional is impractical.