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Details
Made From Cr-V Steel
External star (E-Star) sockets have an internal 6-lobe geometry designed for a high-torque fit that resists slipping.
![](https://media.tekton.com/images/details/impact-sockets/tekton-impact-socket-material.png)
50BV30 Chromium-Vanadium (Cr-V)
Heat-treated to 40-47 HRC for use on impact wrenches. Coated with a corrosion-resistant manganese phosphate finish.
Drive Tool Retention
Sockets work for both types of anvils found on 3/8 inch drive impact wrenches:
![Graphic showing green check marks on friction ring anvil and detent pin anvil](https://media.tekton.com/images/details/impact-sockets/1-2-in-drive/axle-nut/tekton-axle-nut-drive-tool-retention-inset.png)
Two Size Markings
The size is marked in two ways on every socket: a high-visibility laser marking and a permanent stamped marking.
Portable Storage Rail
Keep your sockets organized and ready to go using the included storage rail. The twist-to-lock clips hold sockets securely and can be repositioned anywhere along the rail.
Specs
3/8 Inch Drive External Star Impact Socket Set with Rail, 12-Piece (E4-E20)
![Specs for 3/8 Inch Drive External Star Impact Socket Set with Rail, 12-Piece (E4-E20)](https://images.tekton.com/assets/SID91116_spec.jpg)
Country of Origin | Sockets made in Taiwan. Rail made in USA. |
Item Weight | 0.95 lb. |