The Sealey AK315 is a universal external thread repairer designed for restoring damaged threads on bolts, studs and threaded components. This adjustable thread restorer accommodates both metric and imperial threads from Ø31.75-127mm (1-1/4"-5") external diameter, making it a versatile addition to any workshop toolkit. The tool features a straightforward operation that requires no specialist knowledge. Simply attach the thread chaser to an undamaged section of the thread, then wind back along the damaged area using the knurled adjuster. The chaser will restore the thread profile as it passes over the damaged section, saving the cost and time of replacing components or cutting new threads. Ideal for maintenance engineers, mechanics and general workshop use, this thread repairer is particularly useful for salvaging expensive components with minor thread damage. The comprehensive cutting range covers imperial pitches from 4 to 24 threads per inch (TPI) and metric pitches from 1mm to 3.5mm,