US PRO 6pc Shallow and Deep 1/2" Drive Impact Spline Bit Sockets Set Features: Manufactured from Chrome Molybdenum Steel Black Oxide Finish Each socket has a drilled end to facilitate retaining ball bearing for use on ratchets and breaker bars Supplied in a plastic moulded storage case Can be used with air-powered and battery-powered impact tools Specification: Sizes: 1/2" Drive X 78mm Long M14-16-18 Sizes: 1/2" Drive X 40mm long M14-16-18