Spyderco’s pocket stones are the perfect carry-anywhere sharpeners. Compact, lightweight, and ideal for touching up edges in the field, they come with a protective suede carry case that doubles as a non-slip base during use. Medium and fine-grit pocket stones are one piece high-alumina ceramic. The Double Stuff™ stone is a double-sided ceramic stone, featuring a medium abrasive on one side and a fine abrasive on the other. The Double Stuff 2 is also double sided and has an aggressive Cubic Boron Nitride (CBN) abrasive on one side and a fine ceramic on the other. It also has rounded edges for sharpening serrated edges and a groove for pointed tools.