Combination Spanners – 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm Open end features hip-grip with anti-slip function Handle narrows at the ends to promote improved comfort Hole in the handle for tool securing The design also gives grip on fastenings with worn or rounded corners. Spanner drives on the flank of the fastening rather than on the corner. Chrome Vanadium Countersunk, 12-point ring head set at 15 degree angleThe Teng Tools concept is based on each tool having its own place. Each TT set acts as a part in an organised system by being clicked together with other TT sets and fits perfectly in your service case, tool box or roller cabinet. No space is wasted and each tool sits perfectly in place. This means it is much easier to see whether any tools are missing at the end of the day.5 Steps to Get Organized Choose storage: case/top box, middle box or roller cabinet Choose the TT- sets you would like. Take off the lid Click the sets together Place them in the storage!