Sunex 2847 1/2-Inch Drive Wheel Bearing Lock Nut Set, 7 Piece CR-MO alloy steel for long life Lifetime warranty Heavy duty blow molded storage case For use with 1/2 inch rachet or breaker bar SAE - inches- 6R: 2/38, 2-1/2, 2-9/16, 2-3/4 - 6PT: 2-3/8, 2-1/2, 55mm