The RYOBI LINK Modular Storage System is revolutionizing the storage industry, enabling you to Organize, Access and Transport your life. The RYOBI LINK Tool Box Foam Insert gives you the ability to customize your tool box to keep tools firmly in place. Design your Foam Insert in four easy steps. Simply trace your tool, cut outline of tool, pick out foam and place tool in foam insert. For Use with RYOBI LINK STM101 Standard Tool Box and STM102 Medium Tool Box. Best of all, it is part of the RYOBI LINK Modular Storage System line of products that use the same locking technology to seamlessly connect your mobile and stationary storage needs. Own your space with RYOBI LINK Modular Storage System.