Set of Allen keys - Set of Allen keys - A set of hexagonal Allen keys in a bamboo holder. Includes a nickel-plated carbon steel hex key with the following sizes: 1.5mm - 2mm - 2.5mm - 3mm - 4mm - 5mm - 5.5mm - 6mm. Bamboo is a natural product, so there may be slight differences in color, pattern and size.