Expert 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 30°).Forged from Chrome Vanadium steel with a high chrome finish.ISO 691 - ISO 1711-1.Contents: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19mm.