Metric Folding Hex Key Set 6 Piece - Hex Keys by bogo Brands (Green) Metric Folding Hex Key Set. 6 pc Sizes Included: 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, and 8 millimeter wrenches Fold up hex key set is easy to store and the handle creates better leverage The 6 pc metric hex key set is a must for any tool box, drawer or chest. Guaranteed: If this set does not meet expectations, let us know so we can refund or replace the item