A 3Inch Mild Steel L Clamp is a type of clamp used in construction and metalworking. It is made of mild steel, which is a low-carbon steel that is relatively easy to work with and is less brittle than other types of steel. The L clamp is named after its shape, which resembles the letter L. 3Inch Mild Steel L Clamp consists of two perpendicular arms, one of which is longer than the other.