The EKLIND 25172 7 Piece Metric Fold-Up Hex Key Set is a hex key set that can be used for various applications. It comes with seven hex keys that range from 2 mm to 8 mm in size. The fold-up design of the handle provides better grip and control when working on your project. This metric hex key set features all alloy steel blades, which are resistant to corrosion and rusting. The black oxide finish makes them suitable for working in tough conditions, such as on wet or greasy surfaces. Each long arm hex key has an arm length between 2" and 4.10". Whether you are a professional or hobbyist, you will definitely want to equip yourself with the EKLIND 7 Piece Metric Fold-Up Hex Key Set.