Available individually or in sets, revolutionary SATA BoltBiter Extraction Sockets are the ultimate tools for removing rusted and rounded fasteners. BoltBiter Extraction Sockets grip instead of cutting into fasteners, so, unlike traditional extraction sockets, they not only have a much longer service life, but won’t damage the fastener being removed. The line consists of dual sized sockets that work with both metric and SAE fasteners from 7mm to 19mm 5/16” to 3/4”), with corresponding “minus sizes” to remove severely rounded or damaged fasteners.