STACK PACK COMPATIBLE - Fits with select FLEX STACK PACK tool boxes. Ideal for Medium Tool Box (FS1102) MAXIMUM ACCESSIBILITY - Hang power tools from the front of your storage toolboxes for easy access on the job DURABLE CONSTRUCTION - Made from durable steel and two-piece construction with a slip-resistant design to securely hang tools or batteries CUSTOMIZED EXTENSION - Pre-drilled holes offer customized extension with clamper hooks QUICK INSTALLATION - Easily screws to tool box for durable, secure connection WHAT'S INCLUDED - (1) FLEX STACK PACK Front Tool Rack Rail, (2) FLEX STACK PACK Corner adaptors, fasteners for installation FULL RANGE COMPATIBILITY - STACK PACK toolboxes, organizers, accessory cases, and toolbox attachments are endlessly configurable across the full STACK PACK system