This is a genuine ALCOA brand Hug-A-Lug chrome 33mm hex shaped direct screw on flanged wheel lug nut cover for Alcoa hub covers. This cover works with 33mm hex shaped lug nuts with a minimum of 4 threads per stud to grip on to. The interior threads allow for easy installation and hold on tightly to the lug nut. Alcoa premium nut covers are designed with a highly reflective finish to dress up and protect any rig. Easy to securely install ? just srew on and screw off. These quality nut covers will keep your ride looking its best. Designed to fit over 33mm hex nuts and holds Alcoa 076100 and Alcoa 077100 hub covers in place. Alcoa Wheels designed the first forged aluminum truck wheel in 1948 and Alcoa represents more than 120 years of experience in the production of aluminum along with more than 60 years in forged aluminum truck wheels and accessories. Their automated production lines guarantee quality standards that meet the most demanding demands of heavy transport. Rest assured that Alcoa products will keep you running down the road.