* Corrosion-resistant aluminum arms are durable and strong* Large push button is easy to open with gloves on and it opens by pushing in a natural 'up' motion* 1 One-Key lock cylinder (sold separately) locks the bike to the carrier and carrier to the rack* Soft rubber arms protect skis during transport* Smart vertical spring system adjusts to accommodate all thicknesses of skis and reduces the carrier height when unloaded* Two sets of height extension T-track feet included to raise carrier and protect vehicle roofs from skis with tall bindings