With this centering kit you convert the existing square hole on the Dana44 axles present on the Jeep JK and JKU into a cylindrical hole and increase the contact surface between the bolt and the axle from 8mm to 18mmThey are built in Italy, in C45 steel machined from solid, milled and bored to the hundredth of a millimeter to prevent any vibration.Centering the axles exactly and increasing the contact surface eliminates the annoying problem of the pins wearing out and the axles moving a few millimeters with each off-road outing, improving driving precision and extending the life of the strut silent blocks.Decentralization of bridges is often one of the causes of Death WhobbleThe kit includes the new 8.8 steel bolts with metric threads with self-locking nuts easily available in industrial hardware stores in case of wear.The kit includes everything needed to convert the holes on the upper rear and lower front strut supports from square to round. Conversion is not necessary on the other supports.