All .crv files are from Vectric's V-Carve Pro Version 8.5 Software. Not all .crv files have been tested and/or proven. Those .crv files that have been tested or proven are noted in the product item category with an Asterisk adjacent to its file name. The .crv files have toolpaths that are assigned to most vectors. Upon opening the .crv file there is a warning message that should be read before using attached toolpaths. The Warning message reads as follows: .IMPORTANT: Before outputting any toolpaths you should carefully check all part sizes and the material setup to make sure they are appropriate for your actual setup. You should also check and re-calculate all toolpaths with safe and appropriate settings for your material, CNC machine and tooling.