The Log Wizard attaches easily to almost any chainsaw. Makes notches or debarks poles for: barns, fences, bridges, log home construction and more! Saves time and money. Features all ball-bearing construction for long life and durability. Uses standard 3-1/4" planer blades. Comes complete with .325 and 3/8" spline/sprocket systems. Requires some bar drilling and the saw chain needs to be lengthened.