Strong and lightweight: made of solid cast aluminum, yet light enough to be easily transported. The jaws are made of hardened high-carbon steel, so they do not bend or deform under pressure. The moving parts are made of precision-treated carbon steel and are chrome-plated to prevent corrosion. Flexible: the vise head is connected to a ball joint that allows 360-degree rotation and 90-degree side tilt, so your workpiece can be moved without releasing the jaws. Simply turning the threaded collar locks it securely. This mini vise has a generous 2 1/2 inch capacity and each jaw measures 2 3/4 inches long.