All Stainless Steel 1.125 barrel provides superior strength and insures against rust and corrosionChrome silicone linear compression spring will never rust or fatigue3/4 steel hex plug insures a secure grip with your wrench when adjusting tensionDouble welded 0.125 stop washer supports the weight of your camper with over 5,000 lbs. stress capacitySolid steel round hook features an extra deep, no-slip loop maximizing the secure attachment between your truck and camper