Set of 8 double open ended spanners Different size each end to give 16 sizes total Chrome vanadium steel, satin finish Polished heads Dimensions according to DIN 3110 Organised in a tool tray module size 1 (TT1) Set contains double open ended spanners: 6x7mm, 8x9mm, 10x11mm, 12x13mm, 14x15mm, 16x17mm, 18x19mm, 20x22mm.