Dynamic Impact Socket, Standard, Impact Rated: Yes, Measurement System: Metric, Square Drive, 1/2 in Drive, Hex Socket, 21 mm Socket, 1.57 in Overall Length, 1.17 in Drive End Width, 1.17 in Socket End Width, 6 Points, Steel, Black Phosphate

• Corrosion-resistant black phosphate finish
• Large laser etched markings improve size identification and provide differentiation between sae and metric sizes