Manufactured from Chrome Vanadium steel, hardened and tempered with a fully polished black chrome finish. Innovative ring design allows four different sizes on one spanner. 72-Tooth ratchet rings require only 5º rotation to pick up the next tooth, ideal for applications where space is limited. Features & Benefits:Manufactured from Chrome Vanadium steel, hardened and tempered with a fully polished black chrome finish.Innovative ring design allows four different sizes on one spanner.72-Tooth ratchet rings require only 5º rotation to pick up the next tooth, ideal for applications where space is limited.Size Coverage: 10 x 13, 17 x 19mm.Lifetime guarantee*.Model No. AK7979 Specifications: Model No AK7979 Brand: Premier Black Length: 200mm Nett Weight: 0.20kg Size: 10 x 13, 17 x 19mm