Heavy duty bench mount synclastic tool.? Designed to handle heavy metal (up to 16 gauge), extra-wide (up to 28 millimeter / 1-1/16") or high volume metal work.? Full width metal may "wrinkle" a small amount along the edges during initial forming but these can easily be smoothed out.? Metal should be dead soft (annealed) before forming.? Sometimes two passes are preferred - the first pass gently starting the shape, the second pass completing it.