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This hex key set comes with 10 black finished mm keys and 10 zinc-plated AF keys which are all manufactured from heat-treated carbon steel. mm Sizes: 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 5.5mm, 6mm, 8mm AF Sizes: 1/16”, 5/64”, 3/32”, 1/8”, 5/32”, 3/16”, 7/32”, 15/64”, 1/4”, 5/16” Product SKU ST-HD-WR234 x 1