The Whittler knife is a double-hinged pattern based off of the Pen knife. In addition to the traditional Clip and Pen blade combo, it typically includes a Coping blade that shares a hinge pin with the Pen blade. This triple blade configuration possesses all the edges and points necessary to carve, scribe and shape wood properly. The Seahorse Whittler offers up an extra thick Wharncliffe blade in place of the Clip, for heavy-duty carving jobs.