Bigger Bolt – Bold diameter is 10% larger than typical bolts for added security. Secure – Integrated anti-pry shield behind latch prevents picking and holds lock securely in place during installation. Tougher – Thicker metal security strike backup on jamb side has third screw inside the cup for deeper anchoring into the door. Solid – Zinc bolt has hardened steel pin inside that spins in response to sawing attack, and can’t be cut through.