Nine hex keys that you will never have to fiddle to extract from the holder. Rotating a single key means all the other keys rotate to the side, making all the keys ready for removal. A simple single turn makes getting hold of the right key easy. The keys themselves are chrome-vanadium steel, through hardened and chrome plated. The ball end allows the key to operate at up to 30° from the vertical, very useful in awkward corners. The nine piece set is a delight to use and covers the size range from 1.5mm to 10mm.