I have made keyrings in the past but this time I decided to make a plectrum, now this is mainly secretive as I am led to believe that a plectrum needs to be flexible and the only real use would be for bass guitars with the larger strings.
To make the plectrum I used an old plectrum to draw round with a sharpie and then I used a piercing saw to cut out the shape and then I used a file to champher the edges and then a quick polish on the mop and a quick drill to attach the keychain.