This unique design works on 2004-newer Ford F-150 pickup trucks with 5.4L 3-valve Triton V-8 engines.

Socket end is 9/16". Soft rubber insert holds and protects spark plug during removal and installation.

Extension is part of the socket. Easily fits down spark plug tube in cylinder head.

Socket has 3/8" drive for use with a ratchet or breaker bar.