Double sided Diamond Pocket Stone with leather pouch. For those who prefer a traditionally shaped whetstone style sharpener, Lansky has designed the ultimate in compact full diamond fine grit pocket sharpeners. This diamond pocket sharpeners is double-sided for longer life and greater utility. It features a special groove down the center for sharpening fish hooks, darts, needles and other pointed objects. The double sided Diamond Pocket comes with it's own leather storage pouch.