13 Piece Metric Long Arm Ball Hex Key SetContains Sizes: 1. 5, 2, 2. 5, 3, 4, 5, 5. 5, 6, 8, 10, 12, 14, 17mm. Made of premium S2 tool steel for superior durability and corrosion resistance. Delivers up to 33% more torque than ordinary hex keys. Keys 1 8" & 3mm and larger have size permanently laser marked on the key. Ball end design offers greater access to fasteners from different angles in hard to reach applications. Packaged in: metal case