Yes, side cabinets can be used independently without a rolling tool cabinet. Side cabinets are versatile storage solutions that can function on their own in various settings. They are designed to provide additional storage space and can be placed in workshops, garages, or any area where extra organization is needed. 
When used independently, side cabinets can store tools, equipment, and other items, helping to keep the workspace tidy and efficient. They often come with adjustable shelves, drawers, and compartments, allowing for customized storage solutions tailored to specific needs. 
Moreover, side cabinets can be mounted on walls or placed on the floor, depending on the available space and user preference. This flexibility makes them suitable for both small and large areas. They can also be used in combination with other storage units, such as wall-mounted pegboards or standalone shelves, to create a comprehensive storage system.
In addition to their practical uses, side cabinets can enhance the aesthetic appeal of a workspace. They are available in various materials, finishes, and designs, allowing users to choose options that complement their existing decor.
Overall, while side cabinets are often paired with rolling tool cabinets for a cohesive storage solution, they are fully capable of functioning independently, providing effective and efficient storage in a variety of environments.