Why you need this tool One tool covers a wide range of threading jobs: designed for M1–M27 die sets and accommodates round dies from 12 mm to 55 mm, so you can rethread, restore, or cut threads without swapping handle systems. Built for repeated use under load: the circular die handle frame is made from high-quality 45# steel for hardness, toughness, and reliable torque transfer in demanding threaded applications. Precise, repeatable results: the positioning groove aligns with the frame’s central screw to hold dies securely and maintain correct placement during cutting. Key benefits Compatibility: Works with M1–M27 die sets and accepts dies sized 12 mm, 25 mm, 30 mm, 38 mm, 45 mm, and 55 mm (see size-to-thread mapping below). Durability and performance: 45# steel construction resists deformation under torque and provides long service life for professional or hobby use. Ease of use and storage: removable booster rod improves leverage when cutting tough threads and detaches for compact storage and easier handling in tight spaces. Accurate positioning: the groove engages the central screw on the frame to keep dies centered and stable for cleaner threads and fewer cross-threads. Size and thread compatibility (clear mapping) 12 mm — M1–M2 25 mm — M7–M9 30 mm — M10–M11 38 mm — M12–M16 45 mm — M18–M22 55 mm — M24–M27 Typical applications Workshop and garage repairs: restoring damaged bolt threads, cutting new threads on repair parts, and fabricating custom fasteners. Automotive and machinery maintenance: rethreading studs, nuts, and shafts during repairs or rebuilds to restore fit and function. Metalworking and prototyping: producing or resizing threaded components in small-batch fabrication and maintenance projects. What you get A round die wrench / circular die handle frame compatible with M1–M27 die sets, made from 45# steel, featuring a removable booster rod and a positioning groove that aligns with the frame’s central screw for secure, accurate die placement.