Keyser Manufacturing Ultra Dual Bearing Upper Control Arms feature screw-in upper ball joint sockets, dual sealed bearings for “0” bind and low maintenance. Control Arms are manufactured with an easily removable Bolt-In, Slotted or Slug/Slotted cross shafts. With multiple sizes available ranging from 7 to 11 3/4 inches, pick from a straight or 13-degree ball joint plate to perfectly compliment your chassis design and preferred handling characteristics.