Absolutely the best axe files in current production we've ever used. These super premium specialty files were originally designed by world-famous Sun Valley Ski Tools to produce precise edge angles on competition alpine skis. Of all the files we've ever used working with the mild steel of axes, these are the best we've found currently in production today. Hard chromed to be fast cutting and long lasting. Single-cut. Certified to HRC 67. Available in 8 and 10in lengths. Made in Austria.