It's not really a pencil and it's not really a pen. The Beta Inkless Pen designed by Axel Weinbrecht, is a writing tool with a tiny metal tip made of lead that unlike regular lead pencils, will not wear down with use. It lays down a grey line that doesn't smudge or erase and can be used in any temperature or weather.
The Gadgeteer, Writing instrument that never needs sharpened and never runs out of ink
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