This is the vise I use. The cam flattened off on mine before anything else wore out. Went out, spent $29, got a new one. Took twenty-odd years, 30,000 flies, give or take. I tie down to 26, up to about 4 on mine. I have a couple extra sets of jaws in a baggie here somewhere, never bothered with them. Have the old vise, too, in case I get a wild hair some day and build a new cam.