STANDARDS: NF ISO 1711-1, NF ISO 691, ISO 1711-1, ISO 691, DIN ISO 1711-1, DIN ISO 691 Standard open end combined ratchets: for all current applications. Compact lever reversible ratchet mechanism. 5° increments. Ring head angled by 15°. Open end head angled by 15°. Metric dimensions: 8 to 19 mm. Satin chrome finish.