With their size clearly marked, it\'s extremely easy to find the correct size of spanner for the application The Siegen S0404 spanner set contains a selection of metric/imperial spanners, varying in size from 6-19mm/1/4\"-7/8\" and manufactured from Chrome Vanadium steel for long life. The size is clearly marked on the spanner for easy identification purposes. Features: Manufactured from Chrome Vanadium steel  Fully polished heads  Made to DIN standard and TUV/GS approved  Size clearly marked on spanners Specification: Contents: Metric; 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19mm, Imperial; 1/4\", 5/16\", 3/8\", 7/16\", 1/2\", 9/16\", 5/8\", 11/16\", 3/4\", 13/16\", 7/8\"