• Drop forged, heat treated, chrome molybdenum steel construction with durable phosphate finish
• Radius corner design contacts only flat surfaces of fastener head to eliminate rounding off corners and extend the life of fasteners
• Ball/swivel action makes sockets useful in tight corners
• 1/2-inch drive 6 point swivel metric
• Contents: 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, 19 mm, 21mm