1/4 Inch Single Flute Router BitThese solid tungsten carbide inch router bits have a single flute which takes a bigger chunk of wood with each rotation allowing them to stay cool at lower speeds. Were a big fan of these and theyre Annas go to bit for big projects. Just like our other bits weve reduced the length of the cutting surface a bit to help them cut more quietly, although with the single flutes deep grove they cant be quite as short as the two flute version. Happy cutting!