• For hexagonal head screws ball end, in metric • For all screw applications in trade and industry • High performance alloy steel • Zinc phosphate finish • 1/4" hex drive DIN 3126 and ISO 1173, style E 6.3 • Available in small blister pack of 2 pieces (except the 59S/HBALL-3P packed in 3 pieces) or plastic bag of 5 pieces