What is OD you ask? Olive Drab! The original outdoor color! Great for your hunting bag, workshop, toolbox, glove box and more. The exact same sharpener as our original AccuSharp, but in a color that calls to mind the great outdoors. The large ergonomic handle fits either hand safely and securely. The full length finger guard protects your fingers. Sharpening blades are diamond-honed tungsten carbide and provide years of reliable use. AccuSharp OD Green will not rust and can be cleaned with soap and water, or in the dishwasher. Replacement sharpening blades are available.