The SL61 with First Mate Last Break contacts. What is it ?
  First mate last break contacts are designed to protect users and equipments. They are used for the earth contacts. Mating first and breaking last, they prevent of any electrical shock. The SLG series is the First mate last break version of the SL61. The 7 inner contacts of the SLG 419AR are longer and used for the connection of the 6 circuit earth contacts.
