Set includes 8 pieces: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19 and 20 x 22 mm.Patented U-shaped design.Open end angle 15° with a slimmer head for more accessibility.Large and one-directional size marking for easy identification.Chrome plated micro-matte finishing provides high quality surface.High-performance alloy steel.Less wear on fastener with the large contact surface area of the jaw.Optimised legibility and identification with high-clarity imprint.Standards: ISO 691, ISO 1085, ISO 10102 and ISO 3318.Available in cardboard box