WORKPRO 8PIECE Flex-Head Ratcheting Combination Wrench Set 8-17mm Metric w/Pouch

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.