Not sawn, but cut to fit using very large chisels called slicks. IIRC up to about 2" it's called a chisel. Over that it's a slick. Mine is 4" wide, razor sharp, and has a 18" handle for an overall of about 2.5ft. By holding the flat of the slick against the workpiece and manipulating the rear of the handle with the other, you'd be surprised just how precise you can be with a monster chisel.