Abstract: This invention is a socket insert to protect the finely finished surfaces of machinery and the nuts and bolts associated therewith. This protective insert is in the form of a nonmetallic material and is so sized that it will fit into a standard socket type tool with a smaller opening therein for engaging the nut or bolt to be manipulated. Because of a flare on the outer edge of the insert, the finish on the machinery that the nut or bolt is being used in conjunction with, will also be protected.