Caltrop Core
pinshape
Make your own caltrops with this thing and some 1 inch common nails! scad file included for your customization.
Download Model from pinshape
With this file you will be able to print Caltrop Core with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Caltrop Core.