The newest generation of SEC truck tool box, the SEC X2. It has an end opening push button system for maximum security and convenience. The Special Edition Crown series and SEC Brand truck tool boxes were built for performance enthusiasts. is the first-ever truck tool box line to include industry-exclusive, premium patented features anyone can afford. SEC boxes are built with many features in addition to our standard Better Built features, with the single-lid Crossover being one of the most popular truck tool boxes on the market, as well as the most versatile.