General Tools Self-Centering Punch a fast and simple method for accurately centering screw holes when attaching hinges, hangers, locks, lock strikes, switch plates, and countersunk screw hardware. Designed for ease of use, you simply place the punch in the countersunk screw, and its tapered end automatically finds the center. By tapping the plunger pin, the screw hole will be ly straight and precisely centered every time. Crafted from durable steel, this tool features spring positioning, a sliding tempered steel pin, and a cadmium-grip plated finish to ensure reliable performance and long-lasting use. The package includes one unit, making it a convenient addition to any toolbox. Model Number: 806