WORKPRO 32PC SAE&Metric Combination Wrench Set 12 PT Regular Wrenches set w/Tray

The wrench hardness up to HRC 50 makes the wrench able to bear more force. EFFICIENT WRENCH: This combination wrenches are set up with 12-point box end, doubles the access angle than a 6-point, box end opening is designed to grip flat sides of fastener heads not corners to prevent round-off.