Britool 12 piece ratchet combination spanner set the spanners have a 12 point ogv ratcheting ring end which is flexible through 180 and provides 5 increments the ogv profile maximises the contact space with the nut for a longer lifetime the direction is switched by turning the wrench the open end is angled at 15 from the handle axis increment angle 30forged from chrome vanadium steel with a high chrome finish iso 691 iso 1711 1contents 8 9 10 11 12 13 14 15 16 17 18 and 19mm