The OnGuard Pitbull U-Lock is a high-security bike lock built to protect your bike in medium to high crime areas. Its X4P Quattro locking mechanism secures the shackle on four sides for added resistance to attack. A 14mm hardened steel TriRadius shackle improves strength and increases internal space for easier locking. The design reduces weak points while durable coatings protect your bike's finish during use.Key Features and Benefits:X4P Quattro four-sided locking mechanism: The shackle locks on all four sides within the crossbar, which increases resistance to twisting and leverage attacks. This makes forced entry far harder and helps keep your bike secure in high-risk areasZ-Cylinder locking system: The European-style cylinder is engineered to resist bumping, picking, pulling and drilling. This reduces the risk of common lock bypass methods and protects against targeted theft attempts14mm hardened steel shackle: The thick, heat-treated steel construction resists cutting tools, prying force and jacking attacks. This provides a strong physical barrier that delays or deters theftTriRadius shackle design: The shaped shackle increases internal locking space without reducing strength. This gives you more flexibility when securing your bike to racks or fixed objectsRounded profile with centred keyway: The smooth shape removes flat edges and exposed leverage points. This limits where tools can be applied and reduces vulnerability to prying attacksCo-moulded crossbar and double rubber shackle coating: Protective outer layers shield your frame from scratches and contact damage. This helps maintain your bike's finish during daily useAutomatic weather-resistant keyway cover: The keyway seal blocks dirt, water and debris from entering the cylinder. This keeps the lock working smoothly in wet and harsh conditionsAll-metal end caps and mounting bracket: Reinforced end caps protect against impacts and drops, while the included bracket allows secure transport on your frame. This improves durability and makes the lock easy to carrySecurity is the priority when leaving your bike unattended, especially in areas with higher theft risk. The four-sided locking system and hardened steel shackle work together to resist common attack methods. The anti-pick cylinder adds another layer of defence, while the reinforced construction helps the lock withstand repeated force. Practical details such as the larger internal space and frame-friendly coatings make it easier to use without compromising protection.Choose a lock that is built for real-world threats and daily reliability. The OnGuard Pitbull U-Lock delivers strong security, durable construction and practical usability for consistent protection wherever you park.Specification:crossbar and shackle coatings protect finishes. provide increased locking versatility for securing bicycles and scooters.X4P Quattro Bolt Locking Mechanism locks shackle on four sidesZ-Cylinder is bump-proof and resists picking, pulling or drillingTriRadius shackle creates more internal space for locking versatilityHefty 14mm hardened steel shackle resists cutting, prying and jackingRounded design and centred keyway eliminates pry pointsCo-moulded crossbar cover and double rubber coated shackle protects finishesAll-metal end caps provide additional protection against hits and drops Automatic keyway covers helps seal lock internals against the elements Locking Mechanism: X4P Quattro BoltTumbler Mechanism: Z-Cylinder, European TypeShackle Diameter: 14mm Hardened Steel Coatings: Co-moulded Crossbar Cover with Metal End Caps. Double Rubber Coated Shackle CoverKeyway: Automatic Weather ResistantKeys: 5 Laser Cut KeysWarranty: LifetimeExtras: All-Tube Mounting Bracket Included