Hello Jocke, I've used them dry and also with some water or oil and I can't honestly say which is better. Some will swear that using some water or oil will make the stones last longer and/or cut faster, but I'm not so sure. For me, more important than using a cutting liquid or not is just using a li
Hello Jocke, That tool takes some practice to master, but can ultimately give you superior results and better fitting screwdriver blades. The ideal blade shape takes some time and a lot of adjustment and trial and error to get to, but should look something like the blade in the image below. With a