This 12 piece imperial set of combination spanners are manufactured from chrome vanadium steel with a satin finish body and highly polished heads. 15 open jaw angle to shank and ring end offset, supplied in a wallet for organisation. Features and Benefits Manufactured from chrome vanadium steel for durability 15 open jaw angle to shank making turning easier Ring end offset makes the spanner multi-purpose 12 piece set ensures you have an array of sizes for multiple applications Typical Applications Automotive DIY Plumbing Engineering Standards 1/4 inch - 1 inch conforms to DIN 3113 11/16 inch - 2 inch conforms to ASME B107.6