These Hex Key Sets are zinc plated and made from hardened steel. All the Hex Keys come attached to an included keyring for easy storage. The hex keys come in a variety of sizes from 1.5mm to 5.6mm. - Dimensions (in packaging) 24cm x 20cm x 1cm. Weight 0.130kg (including any pacakging). Material Zinc Plated Hardened Steel and Steel. Packaging Hanging blister card.