General description Teng 9121 Impact Socket Set includes 10 regular metric ½ inch drive 6-point impact sockets, designed for professional use. Manufactured from high-grade chrome molybdenum alloy steel, these sockets are built to withstand the demands of automotive applications and are supplied on a convenient clip rail. Technical specifications Drive Size: 1/2 inch Socket Type: Hex Contents: 10, 11, 12, 13, 14, 17, 19, 21, 22, and 24mm Material: Chrome molybdenum alloy steel Usage Teng Tools impact sockets are specifically developed for use with air tools. Regular chrome vanadium sockets should not be used with power tools to ensure safety and performance. Other information