These slim line open-end spanners are manufactured to DIN 3110 and ISO 3318. Available as an 8-piece set that includes 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19 and 20 x 22mm. It is supplied with a plastic holder with slot for each spanner and holes for attaching to a wall. All the spanners are clearly labelled to make them easy to find. They are suitable for continuous heavy use and have a 10 year guarantee.