Bolt On Wheel Cover Conversion Kitmud Cover Installation Kit, Screw-In Inserts / Rivets Included, 1-3/8 In Spring, Kitpopular Kit For Use On Most Weld And Aero Wheels. Kit Includes: 3)Insert Plates, 3)1/4Bolts, 6)Rivets Approved For World Of Outlaw And Lucas Oil Seriesthread1/4-20 Inthreaded Inserts Includedyesthreaded Inserts Quantity1Bolts Includedyesbolts Materialsteelbolts Colorblackbolts Finishpaintbolts Quantity1Rivets Includedyesrivets Materialsteelrivets Colorzincrivets Finishplatedrivets Quantity2Springs Includedyesspring Length1-3/8 Inmaterialsteelcolorzincfinishplatedquantitykit