The OnGuard Mastiff 2.3 ft Chain Lock delivers compact yet heavy-duty protection for bicycles, e-bikes, scooters, and outdoor equipment. The 70 cm (2.3 ft) chain features titanium-reinforced hardened-steel square links designed to resist cutting, twisting, and leverage attacks in higher-risk environments. Its integrated lock head uses OnGuard’s X2P Dual Lock Down mechanism to secure both sides of the shackle, improving resistance against pulling and prying attempts. A double rubber-coated lock body helps absorb impacts and protect finishes, while the protective sleeve helps prevent scratches and shields the chain from corrosion and outdoor wear. An automatic keyway cover helps block dirt and moisture from entering the cylinder for reliable long-term performance. Includes five precision laser-cut keys.

• X2P Dual Lock Security: Integrated lock head secures both sides of the shackle to resist pulling, twisting, and prying attacks.
• Titanium-Reinforced Chain Strength: 70 cm (2.3 ft) hardened-steel square-link chain engineered for strong resistance to cutting and leverage attempts.
• Compact Heavy-Duty Protection: Short chain length provides powerful security in a portable size ideal for urban parking.
• Protective Weather-Resistant Sleeve: Durable cover helps prevent scratches and protects the chain from corrosion and outdoor wear.
• Complete Key Set Included: Comes with five precision laser-cut keys.


Manufacturer Sku: 8117
Todson Sku: 45008117