This Garageworks module requires assembly, but the directions make it very simple to follow and put together.  Once together, it's very solid, offering a large amount of storage, shelves inside, a lock for basic security, and a lipped top that can be used for parts/tools without worrying about them falling to the ground.  All together, this is a durable storage box for my tools and it will get lots of use in my workshop! [This review was collected as part of a promotion.]