I recently had the need for some long heavy duty bar clamps. Since i did not have any back then, i decided to fabricate some for upcoming projects. The bars are 20x30 mm furniture tubing, and were, along with the nuts, bolts and small hardware the only expenses of the build. SPECS ON THE CLAMPS: Big jaw: 15x12 cm (LxH) Jaw depth 6 cm Small jaw: 10x12 cm (LxH) Jaw depth 6 cm Handle length: 10 cm Moving jaw intervals: 5 cm Thread: M12 (12 mm) Effective clamping length: about 135 cm Weight/clamp: 3,1 kg Clamping power: not yet tested, but enough... Music: PC III - TimeTrain Under a Creative Commons Attribution 4.0 International license: http://freemusicarchive.org/music/P_C_III/TimeTrain/TimeTrain