The Roselli Oy Grandfather knife measures 7" in length and has a 2¾" blade. Following years of research and experiments, H.Roselli developed his own way of processing ultra high carbon containing blade steel (1,5 - 2,0 %). The outstanding edge holding properties of UHC-steel results from the high amount of hard carbides produced in the forging process. Whatever the job - carving, cutting or skinning - UHC-steel holds its edge longer. In fact the edge retains its sharpness twice as long as conventional carbon steel. A strongly constructed leather sheath is a feature of each Roselli knife.