Starex Anti-Slip Chrome Polish Double Ring Spanner is a drop forged from carbon steel/chrome vanadium steel hardened and tempered to sustain higher torques. Finely machined Bi-hexagonal serrations are geometrically perfect to reach faster for a uniform grip. Rich nickel chrome plating enhance surface protection and life. The 12-piece matte finish shallow offset ring spanner set is made of high quality stainless steel ensuring extremely durability. They are ergonomically designed and ideal to be used for all sorts of fixing work. To suit to the specifications of different bolts, they are available in different sizes. They are very user-friendly and can be carried with you anywhere you go. Size: 25 mm.