The Wiha Double Open-End Spanner Set, 12 Piece, is made from high-quality, chrome vanadium steel with a corrosion-resistant and easy-to-clean surface. The design enables high leverage without force, making it easy to open any fastening. With 15° jaw positioning, the double open-end spanners are perfect for working in confined spaces. They are also excellently suited for tightening screws and nuts. Conforms to DIN 3110. This 12 Piece set is supplied in a practical holder. The holder can be opened with just one hand in order to remove the right size from it. Its non-slip surface helps to ensure a strong hold even in oily or wet work situations. Contains the following sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19, 20 x 22, 21 x 23, 4 x 27, 25 x 28 & 30 x 32mm.Additional Information:Metric/Imperial: MetricMin. Size (mm): 6Max. Size (mm): 32