• 4-in-1 Double ended impact socket, 17/19/21/22mm with 75mm 1/2"Sq Drive impact extension bar.
• One socket can be used to replace four different sockets.
• Can safely be used with impact wrench, air ratchet, breaker bar or torque wrench.
• Constructed from Chrome Vanadium Steel (CRV) for maximum strength, ideal for the professional.
• Model No. SX1821