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These Expert 9 piece long arm hex key sets are made from zinc-plated chrome steel and they have a retainer clip for easy storage and transport. Contents • 1.5mm Hex Key • 2mm Hex Key • 2.5mm Hex Key • 3mm Hex Key • 4mm Hex Key • 5mm Hex Key • 6mm Hex Key • 8mm Hex Key • 10mm Hex Key • Retainer Clip