The Expert by Facom Ratchet Combination Spanners have a 5 ratcheting head and a 12-point OGV ring end, which is angled at 15 from the handle axis (increment angle 30). The OGV Ring profile maximises contact surface with the nut for a longer lifetime. The switch to change ratcheting direction built into the handle prevents accidental change. Forged from chrome vanadium steel with a high chrome finish. ISO 691 - ISO 1711-1.