Set of extension bars for use with impact tools Features: Extends the reach of a socket wrench Helps reach bolts that are recessed Manufactured from Chrome Vanadium Steel Black oxide finish Specification: 1/4" Drive bars: 50mm - 2", 100mm - 4”, 150mm - 6" 3/8" Drive bars: 45mm – 1 3/4", 75mm - 3", 150mm - 6" 1/2" Drive bars: 50mm - 2", 125mm - 5", 250mm - 10"