If you intend to really use the whisker pole you will need it to be adjustable. You will need to adjust to the full 150% in light air which should be close to the lenght of the foot. You will also want to shorten it for reefed situations. The line drive variety is a real plus if your boat is over 25'' to 27''. If you intend to fly a symetrical chute then get a spinnaker pole but it will make a poor whisker pole.