Feature 1Sturdy Material: This impact socket set made of heat treated CRV, offering stable performance and long lasting durability, ensuring it can withstand heavy duty use in various applications. 2Wear Proof: The black coating finish on the impact socket resists abrasion and wear, extending the lifespan of the socket and maintaining its high performance over time. 3Etched Size Marking: Each socket is etched with a permanent size marking for quick and easy identification, even in low light conditions, allowing you to select the right socket efficiently every time. 46 Point Design: The design of a 6 point socket can enlarge the touching area with the fasteners, which can lock force more firmly, thus protecting nuts from wear and skid and extending the lifespan of the socket. 5Secure Fixation: The sockets feature a designated slot to prevent easy falling off and sizes printed next to each slot for convenient identification, enhancing efficiency and ease of use during your projects.Item Type: Impact Socket SetDrive: 1/2inSocket Size: Approx. 10mm / 0.39in, 11mm / 0.43in, 13mm / 0.51in, 14mm / 0.55in, 15mm / 0.59in, 17mm / 0.67in, 18mm / 0.71in, 19mm / 0.75in, 21mm / 0.83in, 22mm / 0.87in, 24mm / 0.94in3 Color Sockets: Approx. 17mm / 0.67in, 19mm / 0.75in, 21mm / 0.83in3 Extension Bar: Approx. 3in / 7.62cm, 5in / 12.7cm, 10in / 25.4cm Package List18 x 1/2in Drive Impact Socket Set1 x Plastic Case