An excellent choice for any artist engaged in stretching large numbers of canvases and especially large canvases. These pliers make the job of stretching easier with wide and tenacious, rubber-lined jaws. The spring return handles open automatically ready for the next grip when you release them, saving time and effort. They are made of a lightweight molybdenum alloy. They measure 7 11/16" long overall, with 4 11/16" wide jaws.