Multi Extension Bars: This ratchet set included multi extension bars is suitable for various scenarios: 1pc 1/4" dr universal joint, 1pc 1/4" dr × 2" extension bar, 1pc 1/4" dr × 4" extension bar, 1pc 1/4" dr × 6" flexible extension, 1pc 1/4" dr sliding t-bar, 1pc 6" spinner handle and 1pc bit adapter.