Review on Portable Multifunctional Sharpening Sharpener by Preamer by Steven Brouillard

As I expected, a tube with a piece of diamond coated steel. Grooved side for fishing hooks, flat side and long round tapered end. It looks/feels like coarse sand roughening the edge of a tine or curling in a knife or machete. For this price I wasn't expecting a 600 or 1000 grit. It might get smaller with use. One day I will look for 600-1000.