Mechanical pencil applied at an angle. When excess vertical pressure is applied on the lead, the lead is automatically retracted inwards. Higher-end mechanical pencils often feature a lead hardness grade indicator and sometimes feature a retractable lead guide pipe. This allows the lead guide pipe to retract back into the pencil body, which will keep it protected in storage and during transit and makes it 'pocket-safe'. In spite of the name, pencil leads do not contain the toxic chemical element lead, but are typically made with graphite and clay, or plastic polymers. Compared to standard pencils, mechanical pencils have a smaller range
Lead single with the release of "Formation" in 2016, which served as the lead single to her sixth studio album. The song, accompanied by its music video, was uploaded to Tidal without previous announcement by Beyoncé. Lead single A lead single is usually the first single to be released from a studio album, by a musician or a band, before the album itself is released. During the era of the phonograph record, all music arrived in the marketplace as what is now termed a single, one potential hit song backed by an additional song of generally less commercial appeal on a single