Elora deep crank metric ring spanners elora 6250 professional quality long series manufactured from chrome vanadium steel hardened tempered and chrome plated for corrosion protection ring ends are accurately broached with chamfered bi hexagon profiles for easy nut location and are offset at 45176 sold loosemanufactured to din 838iso 3318 specifications elora 6250 21mm x 23mm deep crank metric ring spanner