Extractor: 2 arms To be used with 4521 Finish: Galvanised 4522-1 fits 4521N-00 to -M 4522-2 fits 4521N-S and -T 4522/B: Spare body 4522K: Spare arm 4522/S: Spare spindle 4522-1/S: M16x1.5x136 4522-2/S: M24x1.5x160