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Black phosphate is a coating used on sockets to protect them from all the dirt, oil, and grease that could potentially break down the socket quality. Ours uses a premium black phosphate finish rather than a black oxide coating traditionally found on other sockets.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.