These SureClips are for Sélden turnbuckles manufactured after 2008, which are today's generation of turnbuckles. It was not mentioned in the catalog of SVB, only a product sheet showed that it is SureClips "B". The term SureClip without the suffix "B" are clips that fit Sélden (or Hasselfor) turnbuckles made before 2008 (slightly wider and the pin is thicker). Some traders still sell these old SureClips.