since the longer guide keeps the lead visible right up against the edge you're tracing

and smooth plastic

or faceted pencils — 4 mm to 10 mm diameter

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caran dache grafstone woodless graphite pencil Chrome Season since the longer guide keepsCaran d'Ache Grafstone is a solid, uncased pencil made entirely from pure graphite rather than a wood cased lead a woodless pencil rather than a standard one. It's wrapped only in a micro thin plastic film to keep fingers clean while writing or drawing, and it feels noticeably heavier in hand than a standard wood pencil of the same size. Because there's no wood casing, the graphite itself sets the limits: sharpen it to a fine point for detail work,