I bought two of these router bits with a sharp 1/4 inch shank. If you signed up to create and have a design to follow you will need a very sharp point. They are made of exceptionally sharp and very hard steel. They work fine at high speed in router and variable speed palm router. I was also able to use this attachment in my high speed laminate cutter to make a very intricate 1/4 inch pine pattern. It showed the drawing perfectly and was easy to use because it was very clear.