OTC 7707 Strut Nut Socket for Volkswagen and Audi This 1-3/4 inch long socket is built for VW and Audi FWD cars in which the top shock-retaining nut is recessed inside the strut tower The tool's center bore allows you to hold the strut shaft from turning using a 7/8 inch (22 mm) hex key and appropriately sized wrench