Britool set of 7 ratchet combination spanners forged in chrome vanadium steel with a high chrome finish they feature and open end angled at 15 from handle axis and have a 12 point ogv ring angled at 15 the ogv profile maximises the contact surface with the nut for a longer lifetime the spanners have a ratchet increment of 5 sizes 8 10 12 13 14 17 and 19 mm