Our 20249 test arm holder for our XYZ 500 series now comes with a clamping collet and includes the holder with 1" extension, 2 connector pins, insulator and screws. The clamping collet has three slots for holding the needle at 60, 75, 180 degrees. This test arm holder is available in 1", 2" and 4" extensions. Other sizes up to 6" are available as a custom part.