3M™ Clean Sanding System Workstation Extension 33654, 1/Case The 3M™ Clean Sanding System Workstation Extension, 33654 expands the storage and organization capabilities of the 3M™ Clean Sanding System. The all-steel three-panel extension provides additional mounting positions for the Workstation's hose hooks and tool holders . The three extension panels allow customization of storage using the 15 included hooks. Kit includes: three-panel extension, 5 Long Double Hooks, 5 Long Single Straight Hooks and 5 Short hooks. Assembly required, hexagonal wrench included 33654