Professional Quality Tool Set Flexible extension bar is perfect for use in situations where nuts & bolts need to be tightened or undone but access is limited or restricted and a traditional solid extension bar simply won"t fit. Includes 4 bars: 3/8" Drive x 12" Long 3/8" Drive x 8" Long 1/4" Drive x 10" Long 1/4" Drive x 6" Long Features: Flexible Spring Steel Shaft Drop Forged, Heat Treated Chrome Vanadium Steel Ends