I found this stone in my late grandpa’s things. I can’t find a tutorial on how to use it safely. Any ideas?
https://ruralfencing.com/products/pocket-size-axe-sharpening-stone
Looks like an axe stone. Can’t recommend a good tutorial other than a scout who knows. But you might find some. The key is a grip that keeps all your fingers on the rim and away from the side you’re using.
Definitely an axe stone, I have one like it for keeping my American woods axe keen for limb lopping and light felling.
You could use it to sharpen a pocket knife, but they are usually too rough to get a fine edge. Fine for a knife that does rough work like a woods knife, but a pocket knife should be sharper than the stone can do.
Don’t need a tutorial, really.
Those are for axes and hatchets. You just use them either along the edge, or from back to front, depending on your preferences. Neither method is going to be dangerous as long as you don’t get in a hurry
You wouldn’t use one of these to do proper sharpening, where you’d be maintaining the angle. It’s just a field tool to keep things working well. I mean, you can do proper sharpening with one, it would just be slower and more annoying than a bench stone.
Carefully, or you’ll cut yourself very badly. Lansky Puck is the modern equivalent.