This tool tray has been a game-changer in organizing my automotive tools. Through trial and error I found that this 3 rail storage tray is the perfect size to hold a wide range of tools .The rail system keeps everything neatly in place and easily accessible, saving me time on the job. The sturdy construction ensures it will last through countless uses. The only con I can think of is that it doesn't come with dividers for the rails, but that's easily solved with some DIY pieces. Overall, I highly recommend this tool tray for any automotive professional or DIY mechanic..