Thank you for your feedback. Our nipple wrench is heat-treated to a Rockwell hardness of 48–52 and is designed to remove most nipples without damaging them. Nipples that are severely seized by rust, corrosion, or overtightening should be treated with a quality penetrating lubricant and allowed to soak before removal. It is also important to keep the wrench squarely and fully seated on the nipple so that pressure is applied evenly to both sides.
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