JX5025-5-shot, fits S&W Pro 640, 642, 442. Fits Remington, Federal, and similar extractor groove diameters, stainless steel, 5 pack
JX5020-5-shot, fits S&W Pro 640, 642, 442. Fits Winchester and similar size brass only, stainless steel, 5 pack
Big Book Catalog, Issue:72, Page:248