Print whichever profile you require, at what scale you would like. Each profile has a 5mm and 10mm size when printed at normal scale. The holes are in case you wish to keep your collection together with a key ring, string etc.
To use, apply the sealant first and use the spreader at 45deg to the wall and drag along the sealant to shape (see images).
If all else fails you have just printed some cool looking guitar plectrums.