Thin-wall cantilever Nude (natural diamond) Most diamond needles are man-made glued onto a mount but this one is a single solid real diamond. This allows for more reliable performance. This fact combined with this stylus being an obsolete genuine Signet product are why our cost is significant to get this stylus. Signet was made by Audio Technica so we have found that our 212 line will work in your Signet 3ea or 5ea or 7LC cartridge. Fortunately Audio Technica did not re-tool the cartridge shape of the premium Signet line.