nail, nails, example i nailed up a fence, or a shelter. usable nails. 3d print license, non commercial no derivatives, Date of invention 1 August 2017. work in progress details may change, Not food. print notes, Stl has various nails for use. aprox 30mm to 100mm. Price. $10 per copy of stl file, then you can use or sell 20kg of nails. Repurchase this stl file for every 20kg of nails. Ownership of this invention i may consider selling for a million dollars maybe.