D2 Tool Steel. It is tempered to 60-62 HRC on a C-Scale. The knife is very well made and is sharp. The handles are known for being lightweight, tough, and not slipping in wet or bloody conditions. 3 Brass O-Ring pins and 1 lanyard hole.The O-Ring pins can be used with para-cord to strap the knife to a pole to make a spear. This knife measures 10.75" with a 5" Blade.