I have 2 of these. They used to call them Hook Hones and they work fine. Mine work just as well today as they did years ago when I bought them. One is on the boat and one is in the workshop. I never had any of the problems described by other reviewers.

I use them to remove the tags and rollovers on filed edges of hooks. A couple of swipes by one of these and the edge is perfect.

This solid fole has 2 diffrent grase of diamond stone.
it sharpen up fillet knife in very precise way..
diffrent than grind stone..

This file is good for about a week, and then everything starts to fall apart. The files dull quickly and the glue that holds the file to the handle fails. Braid products are usually quality. This is borderline garbage. Don't waste your money.

2 flat pieces of flat metal embeded with diamond dust attached to a plastic handle, problem is the two metal strips are poorly glued to the plastic, one has already begun to seperate from the plactic and is bowing in the center because the glue is failing. Sharpened 2 small 4" blade quality knives and already the diamond grit has begun to fail, will not sharpen knife to an edge.....