With a wide range to suit a variety applications.Twin & single screwDiffering cable lengths: 2 & 3 x 6 sq. mmBare and insulated in grey or clear563G Series provided with combination head screws.The 563 Series is more flexible and therefore easier on your fingers and easier to fit into tight J-Boxes. Safety has also been enhanced in the form of a larger insulation cover that shrouds the conductors and cable insulation. The 5mm flat blade access to the terminal screws lets you feel exactly when the terminals are at the correct tension.