I am a hobby carpenter and have a very good wood workshop. I am selective about the instruments I buy and expect them to live up to my high expectations. I don't know why it took me so long to invest in cutters and not cutters. I now use Bosch clip-on wing bits for many router table operations. They are best used for cutting grooves for inserting the drawer bottom into the sides of the drawer frame. Also perfect for adding slits along the top edge of small box projects if you glue the box with the lid in place and then saw the top and bottom as a final step. The milling and finishing of this mandrel is of high quality. Buy it.