The EDC Micro is an extremely light and compact knife sharpening tool that can be conveniently carried in a pocket or tool bag. Diamond and fine-grained ceramic stones with a directed angle (25 degrees) of medium hardness. The whetstones are curved so you can sharpen almost any type of blade. Also includes a 1/4" screwdriver and regular hex keys (6, 8, 10) for knife maintenance (clips, hinges and pins).