Make 6,8,12 and 16 sided projects. Only on edge of the material is cut in stock up to 1-1/4". The interlocking design ofo the joint makes the final frame incredibly simple to glue up with no shifting problems. Great for making planters, barrells, columns, birdhouse, chest lids and tapered legs that can multi-faceted or sandede to a curve. Please go to instructions tab to see how it works.