Will replace all model Coats & Accuturn balancers with 5" & 7" Length 28mm coarse thread shafts. Specs: 1.125" Thread / 28MM x 7" Long (thread length). Fitment: COATS: 600, 650, 700, 800, 825, 850, 925, 950, 1000, 1025, 1050, 1055 & 1250. ACCUTURN: 5100 through 5600 models (Serial # 51-0623 and lower). Interchange Part #: 8308171, 8113167C