Veritas Dowel Former, Insert, 6 mm

This dowel former allows you to make dowels of any length as you need them. You simply drive an oversized piece of wood through the sharp-edged hole of the solid A2 tool steel insert to shear excess material from the dowels. 
The 3" diameter mounting plate (which can be used over a 3/4" or 20mm dog hole) has two screw holes for permanent mounting; the interchangeable inserts snap into it securely.
Individual inserts can be purchased separately; the mounting plate, also sold separately, is compatible with all metric and Imperial sizes.