This ratchet wrenches set included 1/4″ quick release ratchet wrench. Multi extension bars: This ratchet wrenches 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 1/4″dr sliding t-bar, 1pc 6″ spinner handle and 1pc-bit adapter.