Wilton 63300 Shop Vise 4" Jaw Width, 4" Jaw Opening, 2-3/4" Throat Depth Wilton Shop Vises have heavy-duty castings with a 30,000 PSI ductile iron body built for rugged use and extended life. Each has the capability of handling pipe as well as mounting to the bench with 3 mounting posts providing more stability and secure hold.