As its name suggests, an F-clamp is shaped like the letter “F” and consists of one long vertical bar and two horizontal jaws. Similar to a G-clamp, one of its jaws is fixed at one end of the bar while the other is moveable and can slide to different positions. However, the difference between an F-clamp and G-clamp is that the former can open a lot wider than the latter.
Due to its ability to withstand tremendous pressure, an F-clamp is suitable for clamping large and heavy workpieces in heavy-duty woodworking. DIY woodworking enthusiasts can also use the F-clamp to hold workpieces in a parallel manner during glueing.