This britool offset ring wrench set comprises 5 metric wrenches made from chrome vanadium steel with a high chrome finish the wrenches are offset by 70 for better access to recessed nuts their 12 point ogv profiles maximise the contact surface with the nut for a longer lifetime the wrenches conform to iso 691 iso 1711 1 iso 10104 and din 838 the set contains the following sizes20x22mm 21x23mm 24x27mm 27x30mm 30x32mm