For more than 25 years, professional Vermont logger and safety instructor John Adler has taught tens of thousands of forest owners, municipal crews, military units, and many others. Now, his unique approach to on-site chain filing is illustrated in this comprehensive, 21 minute, easy-to-follow video guide. This sawchain sharpening method is drawn from the techniques taught by Northeast Woodland Training in their four day “Game of Logging” safety and efficiency training.