Attach the Thule 9033 Project Tram Hitch Ski Carrier to your Thule Hitch Rack or Thule Spare Me Transport to get up to six pairs of skis or four snowboards to the mountain safely and without trashing the inside of your car. Two-inch Class 2 Receiver will carry up to 6 pairs of skis or 4 snowboards1. 25-inch receiver or Thule Spare Me Transport will carry up to 4 pairs of skis or 2 snowboardsOne-Key lock system for quick, convenient securitySoft rubber arms won't scratch up your top sheets or basesOversized button releases allow you to load the racks without taking off your glovesRequires Thule Hitch or Spare Me rack model 9031, 9030, 9029, 9027, 9026, 9025, 956, 958, or 963XTR for use