Trucks are great for hauling large loads and taking you down the beaten path. However, smaller loads tend to slide around a lot in the back of the truck bed, which can cause damage to your favorite items as well as the truck bed. One option to prevent this is to purchase a more durable truck bed, but you may find it easier and less expensive to install a tool box especially designed for your bed. These boxes usually attach right behind the back window and function as a trunk to hold your tools or other valuables. All truck tool boxes offer the ability to lock up and most are very weather-resistant.
For the construction worker or maintenance man, a steel truck tool box is the only way to go. Steel is incredibly durable, which means it can withstand the daily abuse of you taking your tools in and out all day long. Steel is also highly anti-corrosive, which means that it will work in all the different types of weather that you endure as well. Since they are so durable, steel tool boxes offer great security for tool storage; if you lock them with a good lock, it will be hard for anyone else to access your tool collection. Plus, you can stow your tools easily out of sight and still have plenty of room in your truck bed for some serious hauling.
If you plan to tote around small loads of lighter objects, then aluminum truck tool boxes are an inexpensive way to go. Aluminum is cheaper than stainless steel, and will still hold up to a lot of wear and tear. While aluminum is a little easier to dent, it is still highly anti-corrosive and will withstand any weather condition. This makes it great for hauling extra sets of clothes, boots and work gear such as helmets and gloves. All your gear stays stowed away out of the elements instead of flying around the back of your truck bed.