The safest way to secure most gooseneck style couplers including Bulldog, T.E.M., TEMCO, Hammerblow/Cequent etc. Patented design ensures the most secure way to leave an unattended trailer. Crafted with pride in the United States of the highest grade aircraft aluminum.. Material: Aluminum. Product Weight (lb.): 8.4 lb. Returnable: 90-Day. Product Height (in.): 11 in. Product Length (in.): 5 in. Product Width (in.): 7 in