Shop Cold Steel FGX Battle Ring Griv-Ex Black. Summary of Cold Steel FGX Battle Ring Dagger Point Griv-Ex Black Knife (Black Stonewash) CS 92FRD Overall: 9″; Blade: 3.75″ l Griv-Ex l Standard Edge l Black Finish; Handle: Black l Griv-Ex; Other Info: Full Tang. From the Nightshade Series. Double edge dagger/letter opener blade. Finger ring pommel and keyring attachment. UV and heat stabilized makes this tool impervious to the elements. Light enough to be tied, tucked and taped just about anywhere. Hang Packaged.