Part of the teng tools tc control system set of 28 hex keys metric and af and tx keys supplied in the unique teng tools tc tray with removable lid and dovetail joints for use on its own or as part of the teng tools tc control system features and benefits set of 28 pieces contains two hex key sets in metric and imperial sizes 1479mm and 1479af a tx set 1479tx and a 7 mm hex key with ball point supplied in plastic case with removable lid fits in teng tools tool boxes and roller cabinets technical