They attach to two 2x4's that you purchase locally. Attached with the hardware provided, the two rails provide a flat surface to guide your first cut with the Alaskan Mark III . Your regular stock chain on your saw works okay when it is sharpened correctly. The zero degree top plate angle reduces the power needed to rip and produces smoother lumber than your regular stock chain. However neither of the above works as well as Granberg Ripping Chain .
Oil has to travel to the bottom of the bar where most of the cutting is done.
For smaller bars and small cuts, this system works fine. To mount the kit, two holes are required to be drilled through the end of the bar. This allows you to mount the kit on either side so that you can turn the bar on a regular basis for even bar wear. Setup and make your first cut, remove this first slab, then use the Mini-Mill II to edge the log. This will give you a three sided cant from which dimensional lumber can be cut.