Don't ruin a perfectly good screwdriver by cutting a notch out of the blade to fix valve hand wheel problems. Easy removal and installation of valve hand wheel nuts, fits most manufacturer's valves, this XS Scuba Valve Hand Wheel Tool is a must for the serious diver. Tool has an easy-to-grip handle, makes a great save-a-dive-kit item and the dive it saves may be your own! Tool also makes a great gift idea.