You searched for "framework workbench"
RS PRO
RS PRO Aluminium Square Bar, 25mm W, 25mm H, 1m L
Part: 124-3629
Strong lightweight aluminium square bar for structural frameworks and supports.
RS PRO
RS PRO Aluminium Square Bar, 20mm W, 20mm H, 1m L
Part: 136-8736
Medium-sized aluminium square bar for frameworks, supports, and structural engineering projects.
RS PRO
RS PRO Aluminium Square Bar, 15mm W, 15mm H, 1m L
Part: 136-8735
Light-weight aluminium square bar for frameworks, supports, and structural engineering uses.