This instant-acting bar clamp combines high-quality standards with a low price and lightweight construction, making it ideal for patternmakers, wood- and metalworkers, and home crafters. The multiple-disc clutch permits instant adjustment, secure hold, and easy release. The bar is constructed of spring steel and measures 1/4 by 3/4 inch, with a 3/8-inch-diameter steel screw and a 2-1/2-inch reach from the edge of the bar to the center screw.