1/2" dimensions: Outer opening wire diameter 31.5mm, inner opening wire diameter 20mm, total length 61.5mm, handle distance/interface 6.35mm 3/4" dimensions: External opening wire diameter 34mm, internal opening wire diameter 25mm, total length 61.5mm, handle distance/interface 6.35mm Hexagonal handle joint bar dimensions: Total length 74mm, handle distance/interface 6.35mm A 4-inch pipe is 1/2" (nominal diameter DN15). A 6-inch pipe is 3/4" (nominal diameter DN20). Integrated internal and external pipe thread cutting tool: This pipe thread cutting tool is designed to handle various pipe tasks. Whether you are a professional plumber or a DIY enthusiast, it can ensure cleanliness on pipes of all sizes, precise threads, and simplify the installation of fittings. Selected material: Made of steel, this threaded kit has a long service life. The combination of top-quality steel ensures long-lasting performance, making this tool a reliable choice for both professional and home projects. Dual-function threading comprehensive kit: The pipe threading pipe kit includes a reusable plastic pipe circular mold, available in two universal sizes, and seamlessly connects with PPR, plastic and MPP pipes - ideal for pipe repair, DIY upgrades and electrical pipe installation. Precise design: Each component of the threading kit is meticulously crafted with meticulous details and outstanding engineering, ensuring smooth and accurate thread formation at all times. The precise design ensures a safe and leak-free connection, effectively preventing costly errors and simultaneously enhancing installation efficiency. Wide application: Whether you are a DIY enthusiast or a professional plumber, the rear-making tools included in this pipe threading pipe kit are an indispensable addition to your toolkit, simplifying the process of threading pipes and improving your work efficiency."