This Sealey Premier Lock-On Combination Spanner Set includes 12 pieces, featuring drop-forged Chrome Vanadium steel combination spanners. They are hardened and tempered with a fully polished micro satin finish for corrosion resistance. The 15° offset ring ends are designed to keep knuckles clear of obstructions, while the 35° angled offset open-end allows for improved access. These spanners feature specially machined flutes in the walls of the ring end, enabling use on up to 85% rounded fasteners. This provides added strength and prevents further damage to worn or rusted fixings. The set includes sizes 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm and is supplied in a folding storage rack. This product comes with a lifetime guarantee. Model No. AK63921. Weight: 1.36kg.