Drop-forged for the most arduous duties with especially close-tolerance jaw widths. Special hollow form, even for nuts on long projecting threads. Same jaw width at each end; on sizes 6 and 7 these are both single hexagon, from size 8 single hexagon at the long leg and bi-hexagon on the short leg. Angled at approx. 90 - 95°.
Chrome vanadium steel, chrome-plated.