The Seatylock Mason Bicycle U-Lock features a unique triangular 17mm crossbar for best strength/weight ratio and a double deadbolt locking mechanism for protection against twist attacks.

Features:

• Unique triangular crossbars - Best strength/weight ratio
  
• Double deadbolt - Additional protection against twist attacks
  
• Automatic cylinder shutter mechanism - Keeps dust and water away from your cylinder
• Anti-drilling components - Cylinder and other components are drill resistant
  
• Protected against the elements - Metal components are rust free and plastic cover is UV protected
• The bike's frame is protected - Links are plastic coated to prevent scratches
• Silent ride - A rattle elimination mechanism prevents the lock from shaking while riding 
• 3 keys included
• Mounting bracket not included
• Circumference of U-Lock: 17mm
  
• Dimensions: L 18 x W 8.5cm
  
• Weight: 1.07kg
• Colour: Black
• Warranty: 6 months, extended to 2 years if keys are registered with Seatylock