General description Sealey AK315 Premier Metric/Imperial Universal External Thread Repairer/Chaser is designed to restore damaged threads efficiently. It features an adjustable thread restorer that accommodates both Metric and Imperial threads with an external diameter range of Ø31.75-127mm (1-1/4"-5"). Simply attach it to the undamaged section of the thread, wind back the thread using the knurled adjuster, and the chaser will effectively restore the damaged area. Technical specifications Model No. AK315 Adjustable thread restorer for Metric and Imperial threads External diameter range: Ø31.75-127mm (1-1/4"-5") Built-in storage for six dies