Some keyring gadgets made from 6mm x 4mm titanium tube.
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CRX Titanium Magnetic Extendable Keyring Pen
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CRX Titanium Magnetic Extendable Keyring Toothpick
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CRX Titanium Mini Ferrocerium Rod
Titanium 6mm x 4mm tube with a 4mm thick striking rod.
It is 69mm in length closed, 115mm open and 6mm in width.
4mm x 2mm neo magnet in the tube with a piece of carbon steel drilled into the rod to keep it together with a ring stopper.
Pull the rod out & flip it round to use.
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CRX Utility Keyring - CRX CuTi Atom, Hobi Ti+ 365nm UV & Petrol Lighter, Ti Pen & Toothpick, CuTi 1.6W 450nm Laser