Here is the one I have. Tandy I think. It has a chisel type tip, a ball point pen looking tip, and 2 not very effective edger tips. I have been using the angle piece as the edge guide and the chisel tip for grooving but they are too thin. I just tried the ball end on the leather shown, multiple times, to get that groove. My L shaped piece is square and too dull as it is to groove. Which are you saying to use?