Ultra High Carbon Steel Blades - Following years of research and experiments, Mr. Roselli has developed his own way of processing Ultra High Carbon steel (carbon content 1.5 - 2.0%). The amazing edge holding properties of his blades result from the amount of hard carbides produced in the forging process and meticulous attention to detail. Each blade is tempered to Rockwell 64 - 66 and sharpened to a razor sharp edge. They will easily hold their edge twice as long as tools made from conventional tool steel. The handles are made of kiln dired birch and each knife comes with a leather sheath. This UHC Detail Knife is used for carving and other small work. The blade length is 2-3/8˝ and overall length is 6-1/2˝.