The Mastiff series offers cyclists and power sports enthusiasts more high security options in a lighter, more compact package. 10mm hex-link chains and square section bar links resist attack from saws and cutters. Quattro an...

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Product Review

The Mastiff series offers cyclists and power sports enthusiasts more high security options in a lighter, more compact package. 10mm hex-link chains and square section bar links resist attack from saws and cutters. Quattro and dual lock mechanisms feature dual lock down protection and 4 laser-cut plus 1 TorchKey. All locks have vinyl coated large diameter ultra-hardened steel shackles and rubber coated end caps. Nylon chain covers help protect painted surfaces. Backed with an anti-theft protection program.

  • High-Security X2P Head: Integrated X2P Double Bolt Lock Head provides extreme pull resistance and features a dual rubber housing for added impact and weather protection.
  • Heavy-Duty Steel Chain: 1090 mm chain made from 10 mm hardened-steel hex links delivers superior cut, pry, and leverage attack resistance for confident daily protection. Weighs 5.7 pounds.
  • Built for Riskier Areas: Ideal for medium-to-high threat environments, offering reliable defense for bikes, e-bikes, scooters, and motorcycles during everyday use.
  • Advanced Z-Cylinder Core: Precision-engineered locking cylinder resists drilling, bumping, and picking, ensuring long-term reliability and theft prevention.
  • Includes Five Keys: Comes with five laser-cut keys—including one LED key—offering smooth operation and excellent visibility for night-time use.

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