Features: All 1/2” Drive Black finish Made from heat-treated hardened and tempered Chrome-Vanadium Steel For use on all air powered & battery powered impact tools/wrenches & breaker bars Industrial black phosphate finish  Drilled end to facilitate retaining ball bearing for use on ratchets and breaker bars Includes: 3pc 1/2"Dr impact extension bars 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.