General description Neilsen 9pc Long Hex Key Set features metric ball end L keys made from durable chrome vanadium steel. This tool kit is designed for ease of use and efficiency, making it an essential addition to any DIY or professional toolbox. Technical specifications Material: Chrome Vanadium Steel Sizes: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm Usage Ideal for tightening and loosening hex screws in various applications. Ball end design allows for angled access to fasteners in tight spaces.