General Tools Steel Self-Centering Punch

Fast, simple method of centering screw holes for attaching hinges, hangers, locks, lock strikes, switch plates and countersunk screw hardware. Place punch in countersunk screw, tapered end automatically finds center. Tap plunger pin, screw hole will be straight, absolutely centered. Made of steel with spring positioning, sliding tempered steel pin, cadmium-grip plated.