Manufactured from Chrome Vanadium steel, hardened and tempered with a fully polished black chrome finish. This Sealey spanner features an innovative ring design allowing four different sizes on one spanner. The 72-Tooth ratchet rings require only 5º rotation to pick up the next tooth, making it ideal for applications where space is limited. It is part of a comprehensive range of Premier Hand Tools, suitable for daily professional use. The spanner covers sizes 10 x 13mm and 17 x 19mm and comes with a lifetime guarantee.