I use the grizzly’s. After my 1st round of using file and stones, I bought a 1”x30” belt sander from harbor freight. It was less than $50 and has been a great tool addition to my shed. I use it all the time. Sharpened every knife in the house when I 1st got it. You can even buy a leather belt from amazon for it. I think that leather belt cost almost as much as the sander. Lol. But it is great and quick!