552/ Teng Deep Impact Sockets Metric 1/2in Drive - 28mm, Barcode: 5020385122215 | Product Code: TEN920628. Teng Tools impact sockets are specifically designed for use with power tools and air tools. Manufactured in chrome molybdenum in accordance with GGG-W-6608, these sockets ensure the highest quality. They are size marked for easy identification. These regular 6-point deep impact sockets have a ½” inch square drive. They are manufactured to the latest DIN standard for industrial use.