This unique design works on 2004-newer Ford vehicles with 5.4L, 4.6L, V8, 6.8L, V10, 3-valve 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 a 3/8 drive for use with a ratchet or breaker bar.
