This is a spinnaker pole car with a 10 degree downward toggle jaw fitting that slides on Selden's 25mm track.
It is designed for end-for-end pole gybing.
It can be used with the following pole diameters:
Aluminum - 48/48 - 96/96
Carbon - 47/47 and 88/88
NOTE that the toggle on this car has narrow jaws that will only fit uncommonly narrow spinnaker pole end fittings. The same car with a wider toggle is available by special order (SLD 511-553-01).