Designed for our Rear Axle Housings, similar sheet metal housings, or stock-style Ford® 9" housings. Heat treated, Grade 8 steel studs provide solid mounting points for the center section differential. Manufactured with splined ends, the press-in studs are pulled through from inside the housing. Includes nuts and copper sealing washers - far superior than steel to prevent seepage and leakage. Packaged in sets of 10 studs, nuts, and washers.