Kirschen Firmer Gouge – 30mm – ferrule on the hornbeam handle, to endure pounding with a mallet – will also work equally well for the more gentle use with paring. The 30mm size refers to the distance between the points on the top of the arc of the curve at the cutting edge. Great for hardwood spoons where you need the extra grunt over a hook knife. They come nicely ground – and we hone them so they are ready to use as soon as you get them.