Versatile hex-shank design — fits standard electric drills for fast, power-assisted threading and re-threading. Ideal when you need speed and repeatable results without manual effort. Integrated 4-point / 6-point heads — covers common pipe thread needs: 4-point head for 20 mm pipes and 6-point head for 26.5 mm pipes. The combined design reduces tool changes and adapts to different water line fittings. Purpose-built for internal pipe work — designed as an internal thread cutter/threader set for plumbing repairs and maintenance on water lines and fittings. Works reliably on a range of domestic plumbing tasks. Where this helps most: Repair a leaking sink or basin tap by re-threading the valve housing to restore a tight seal. Replace or refurbish valves and fittings in a garage or workshop quickly using a power drill. Service outdoor irrigation or garden pipe fittings on-site — suitable for indoor and outdoor use. Why you need it: Saves time: drill compatibility speeds up threading compared with hand tools. Reduces part waste: restores damaged threads so existing fittings can be reused. Practical for DIYers and professionals: useful in homes, garages, offices, and field work. Key attributes: Compatibility: hex-shank fits standard electric drills. Sizes: 4-point head — 20 mm; 6-point head — 26.5 mm. Application areas: internal thread cutting for plumbing, maintenance, and repair, indoors and outdoors. This threading set is an essential, reliable tool for routine plumbing repairs and maintenance where efficient, drill-powered internal threading is required.