LISTING INCLUDES: 15pcs Metric Thread Chaser Set FIT FOR: Universal ABOUT PRODUCT: Thread chaser set includes: Metric: M12*1.75, M12*1.5, M12*1.25, M10*1.5, M10*1.25, M8*1.25, M6*1.0; thread restorer file Special thread repair kit used for chasing worn and damaged threads and cleaning stubborn dirt and corrosion without shaving off metal. A must-have thread chaser kit for any auto mechanic for chasing threads on rusty fasteners and bolt holes on cylinder heads, engine blocks, and bodies of vehicles. .