Using these tool boxes is simple. Just open the double - hinged hasp and place your tools inside. If you want to secure it, you can add your own padlock (shackle diameter no greater than 7/16'). When transporting, use the two sturdy handles. For models with casters, you can easily roll it around. If you're using a forklift, align the forks with the fork pockets. When it comes to maintenance, keep the box clean and dry. Wipe it down regularly to prevent rust, especially if it's made of aluminum. Check the hinges and hasp from time to time to make sure they're working properly. Remember, all the measurements are approximate, so there might be slight variations. Also, the weights shown are for shipping, so the actual weight with tools will be different.