Sturdy but not precise. The sliding jaw is very wobbly and doesn't have a machined sliding fit on the base (like a T shape or a cone shape like a real drill vise). Workpiece or part you want to drill or machine but not very accurate due to wobbly jaws. Thus, no really precise positioning of the workpiece can be achieved than if the sliding block were more limited. I wasn't expecting much for $17 and didn't get it. These aren't my main drill press vises, I needed them for a special jig I'mβ¦