Brand new and high quality. Product: Socket Adapter. Material: CR-V chrome vanadium steel. Silver hardness: 60HRC. Diameter: 1/4", 6.3mm, 3/8", 10mm, 1/2", 12.5mm. Color: Silver. Quantity: 1pc. Total length: 1/2: approx 75mm, 3/8: approx 60mm, 1/4: approx 41mm. Features: High quality, durable, beautiful appearance, easy to use, and widely used for vehicle modification and maintenance.