The RTAK II is a super large survival knife featuring a 10-1/4" blade made of 5160 carbon steel with a flat finish for protection. The thick Micarta handle is removable for cleaning. This knife is large enough for any task you put it to! The sheath is a deluxe Nylon combat type system with a pocket on the front and plastic liner for the blade. Improvements on this model over the now discontinued RTAK I include a better finish on the blade, better guard built into the handle design and overall superior fit and finish.