●Manufactured from hardened and heat treated Chrome Molybdenum steel. ●Suitable for limited access applications. ●Phosphate finish for corrosion resistance. ●Contains; 3/8 inch drive sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 & 19mm 1/2 inch drive sizes: 21, 22, 24, 27, 28, 30 & 32mm ●Supplied in a sturdy storage case. ●This set is part of the Britool Hallmark range. ●Please note that the tools themselves are not marked with any brand.