Product details:

Chrome-v-moly super tool steel. Hard chrome finish . Twenty-two piece set includes ball end hex L-keys: inch .050, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 and metric: 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0mm with two ergostar auto open holders.