Neiko 00239A Flexible Extension Bar Set (2 Piece), 1/4" x 3/8" - 6" x 8", Clear Automotive pros depend on flex extension bars to quickly loosen bolts and nuts at awkward angles and difficult to reach locations for light duty torque applications Durable Chrome-Vanadium anvil and anvil-receiver with mirror chrome finish; Heavy-duty wound spring-steel; PVC sleeve Maintains excellent rotational torque-transfer from ratchet to socket; Heavy-duty wound spring-steel provides flexibility to 45-degrees Spring-loaded ball detents lock in to prevent parts from slipping into machinery; Square drive radius corners reduce tool and socket wear 3/8-inch drive flex bar (8-inch length); 1/4-inch drive flex bar (6-inch length)