WORKPRO 8PCS 5/16-3/4"/8-17mm Flex-Head Ratcheting Combination Wrench Metric/SAE

The wrench hardness up to HRC 50 makes the wrench can withstand more force. Efficient and Precise: The 72-teeth ratchet gear inside the box ends is smooth and requires only a 5-degree working swing arc, allowing it to turn in limited spaces and enabling easy and fast operation.