The Britool open-end spanners (metric) are forged in chrome vanadium steel with a high chrome finish. The open end is angled at 15 from the handle axis.
ISO 691 - ISO 1711-1 - ISO 3318 - ISO 10102 - DIN 3110.
The Britool BRIE113256B Metric Open End Spanners has the following dimensions:
Size: 18 x 19mm