The britool e117744b spanner set consists of 9 offset combination spanners these spanners have a 12 point ogv ring angled at 10 and an open end angled at 15 from handle axis the ogv profile maximizes the contact surface with the nut for a longer lifetime the spanners are forged in chrome vanadium steel with a high chrome finish sizes 8 9 10 11 13 14 15 17 and 19 mm iso 691 iso 1711 1 iso 3318 iso 7738 din 3113