Sealey 16 piece metric reversible ratchet combination spanner set sealey premier ak6381 high quality slim style chrome vanadium steel spanners hardened tempered and mirror finished for corrosion resistance 72 tooth chrome molybdenum walldrive ratchet ring with slide reverse meets and exceeds iso 1711 din 899 and bs 3555 torque standards by our reckoning the strongest range of ratchet spanners on the market 15 offset keeps knuckles clear of obstructions ideal for use where space is