A bar clamp features a long, metal bar and is designed to withstand the pressure of holding large and heavy workpieces

A bar clamp is made up of a long, metal bar and is designed to hold large and heavy workpieces. Due to the strength of the steel bar, and ability to withhold the holding pressure, it is capable of heavy-duty clamping. A bar clamp is also called a speed clamp or F clamp as its shape resembles the character F.