Why is Watch Friendsit that the moment you need a pen, it's nigh-on impossible to find one.

Behold, an ingenious solution to your pen-hunting woes: pen nails. Or, in layman's terms, false nails with tiny pens attached to them.

Instagram nail artist @TonysNail is the genius behind the nail-art-meets-stationery-supplies. And, what a practical person you are, Tony.

Pen nails are basically falsies adorned with lots of tiny gems with the added bonus of a pen nib and a spring mechanism.

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From afar, it might not be all that easy to spot that these nails double up as makeshift pens. But, on closer inspection, they contain all the inner workings of your average biro pen, right down to the spring mechanism.

The question is: do they actuallywork? According to a video posted by Tony's Nails on Instagram, it appears that they do indeed work.

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It looks like the person modelling the creations only attempted squiggly lines. Still very impressive, nonetheless.

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Try not to scratch your face when wearing these nails. You could end up with squiggles all over your face.