Columbia River Knife and Tool (CRKT) sought input from Terry Renner to develop the Neckolas. This knife arrives with a fully serrated round blunt tipped blade. The sheath has a clip that allows you to attach it as a left- or right-handed knife. But this knife's most distinctive feature is its thumb lock. As you draw the knife your thumb pushes down, releasing the knife to keep the knife secure. The Neckolas' blade is made from 8Cr13MoV, which is highly corrosion resistant and holds an edge. The handle is made from bright orange checkered G10.