Impact socket extensions and adapters can be one of the most valuable tools in your toolbox. These adapters can help minimize fastener rounding and extend fastener life. They turn worn, rounded and rusted fasteners more easily. We have many different sizes and styles to choose from. Impact extension are ideal for gaining access to fasteners in locations that would otherwise be difficult to reach. Ideal for applications that require greater torque that standard fasteners. Be sure to shop online at Grainger to find just the tool you're looking for.