3PC 1/2" DRIVE IMPACT EXTENSION BAR SOCKET SET 75MM 125MM 250MM LONG SHORT TOOL Description A high quality, heavy duty set manufactured from hardened HRC 43-45 steel for added strength and durability. They have a 1/2" drive and can be used with air tools and all kinds of impact tools. The set comes in 75mm (3"), 125mm (5") and 250mm (10") lengths. Sizes are laser etched on the side for easy identification. Black oxide finish for corrosion resistance. Made from heat-treated hardened and tempered Chrome-Vanadium Steel. With an industrial black phosphate finish. Set Includes - 1x 1/2" inch drive extension bar by 75mm long (approx 3"), 1x 1/2" inch drive extension bar by 125mm long (approx 5"), 1x 1/2" inch drive extension bar by 250mm long (approx 10"). All 3 extension bars have a heavy duty spring loaded ball bearing to hold socket securely in place. And all 3 extension bars have a drilled end to facilitate retaining ball bearing for use on ratchets and breaker bars.