High-Security Bicycle and Scooter Lock with X4P Quattro Locking Mechanism Ensure superior protection in medium to high crime areas with this robust U-lock featuring the innovative X4P Quattro Locking Mechanism for four-sided security. The heavy-duty 14mm (0.55'') hardened steel TriRadius shackle resists cutting, prying, and jacking, offering enhanced durability and locking versatility. Its new crossbar and shackle coatings safeguard the finish, while the rounded design and centered keyway eliminate pry points for increased security. The Z-Cylinder is bump-proof and resistant to picking, pulling, or drilling. The lock includes a double-team PITBULL U-lock and cable for flexible securing options. Additional features such as all-metal end caps, co-molded crossbar cover, double rubber-coated shackle, and automatic keyway covers provide comprehensive protection against impacts and weather conditions.