The ROCKBROS Heavy-Duty Anti-Cut Bike U-Lock is a high-security locking solution built for daily riders who park in busy areas and need solid protection without sacrificing portability. Its vacuum heat-treated alloy steel shackle, 22 mm diameter, and silicone-protected finish deter theft while safeguarding your bike’s frame.

• Material & Heat Treatment: Heavy-duty alloy steel strengthened through vacuum heat treatment for enhanced cut resistance.
• Shackle Diameter: 22 mm maximum shackle diameter provides strong protection against bolt cutters and leverage attacks.
• Weight: 1.76 lbs (0.8 kg), balancing security with manageable carry and ease of use.
• Dual-Sided Security: Dual-sided design offers reinforced tamper resistance from multiple angles for heightened deterrence.
• Lock Core & Durability: Precision-engineered core with a unique key design resists picking; protective dust cover and durable cylinder extend service life.
• Silicone Coating: Thick silicone wrap protects your bike’s finish from scratches and daily wear during transport and use.
• Mounting Bracket: Includes a mounting bracket that attaches securely to your frame for convenient on-the-go access (8.27 × 4.33 inches / 21 × 11 cm).
• Versatility: Suitable for road bikes, mountain bikes, e-bikes, and commuters; also practical for securing gates or fences.

With the U-lock in your arsenal, you can confidently park in urban hubs, campuses, or transit hubs, knowing the shackle’s strength and the anti-pick core raise the bar for security. The silicone coating minimizes paint scratches, so your bike stays looking fresh after daily rides. The included mounting bracket means you can mount the lock on your frame for quick locking and unlocking, making it ideal for short stops, coffee runs, or multi-stop commutes. Whether you ride a lightweight road bike, a rugged mountain bike, or an everyday commuter, this ROCKBROS U-lock is designed to deliver reliable, low-maintenance security night after night.