and even tattoo artists use these for sketching on skin before needle work

You can check out all pens and other products from On The Run here

but it is also perfect for decorative painting and for graffiti

Hardcover with hot foil stamping on iridescent linen (blue thread on yellow fabric)

and for those tiny details

viking beta 2 hole pencil sharpener Dart and even tattoo artists useThe Beta packs two separate sharpening openings into one beechwood block, each with its own carbon steel blade a smaller 8. 2 mm opening for standard pencils, and a larger 11. 2 mm opening for thicker pencils like jumbo graphite, watercolor pencils, or cosmetic pencils that wouldn't fit a standard single hole sharpener at all. That covers most of a working pencil collection from one block instead of needing a separate sharpener for oversized pencils.