Offset Cummins Feeler Gauge. Gauges are made from the finest grade steel and are hardened and tempered to withstand long wear. All gauges are equipped with knurled lock-nuts. Contains: Fourteen 6" x 1/2"(150 x 13mm) blades with 1" x 90 degree ends.Includes sizes of the following thicknesses: Length: 6"(150mm) .008", .011", .012", .017", .018", .020", .023", .024", .025", .013", .014", .016", .027", .029"