On Guard

Mastiff Chain Lock - Keyed, 1800mm x 7mm

OnGuard Mastiff Chain Lock is a keyed bicycle chain lock built for everyday theft deterrence with a practical 1800mm length that makes it easier to secure a frame and wheel to larger racks, posts, or awkward anchoring points.

The 7mm chain format targets a useful balance of security and carry weight for commuters and utility riders who want a serious lock without the bulk of the heaviest chain options. A protective, water- and heat-resistant sleeve helps keep the chain from scuffing paint and reduces abrasion during transport and daily use.

• 1800mm (1.8m) reach - Wraps around fixed objects more easily, improving real-world locking options in crowded bike parking
• 7mm chain - A security-forward chain size aimed at strong deterrence while staying more manageable than ultra-heavy chains
• Protective chain cover - Water/heat-resistant sleeve helps prevent frame abrasion and keeps the chain quieter and cleaner in use
• Keyed lock convenience - Includes (5) keys to simplify spares for home, work, or multiple riders
• Reinforced chain construction - Uses a hex-link style chain with reinforcement intended to improve cut resistance versus basic chain locks