Gatco Sharpeners Backpacker 2-Stone Sharpening System, Black is a part of the high quality and dependable Knife Accessories from Gatco Sharpeners. All of the features you need for a price you want. Knife Accessories from Gatco Sharpeners are well known for their quality and Gatco Sharpeners Backpacker 2-Stone Sharpening System, Black upholds that standard.