Onguard Mastiff 8019L Chain Lock - With Boxer U-Lock BLK/YEL 6 FT

Onguard Mastiff 8019L is a titanium-reinforced 10mm hardened steel chain lock paired with a Boxer U-lock disc brake lock, designed for V-twin motorcycles. The chain's hexagonal links offer multiple locking angles, and the included micro-light key projects a bright beam for low-light security checks.

Features

• 10mm titanium-reinforced hardened steel hexagonal chain
• X4 Quattro Bolt locking mechanism
• Boxer U-lock works standalone as a disc lock
• 5 laser-cut keys including 1 micro-light key with bright white beam
• 18-inch chain length for frame and wheel security

Specifications

• Brand: Onguard
• Manufacturer Part #: 45008019L
• UPC: 768661280758
• Length: 18 in
• Width: 6.5 in
• Height: 2 in
• Weight: 10.1 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

Can I use the Boxer U-lock separately from the chain?

Yes — the Boxer U-lock functions as a standalone disc brake lock without the chain if needed.

How many keys come with this lock?

Five laser-cut keys total: one micro-light key with a bright white beam projector and four extra grip keys.

What makes the hexagonal chain link design better?

Hexagonal links provide more locking angles and contact points compared to round links, reducing the chance of bolt cutters gaining leverage.

Is this chain thick enough to resist bolt cutters?

The 10mm titanium-reinforced hardened steel construction resists most common bolt cutters and angle grinders, though no lock is 100% theft-proof. Park in well-lit, visible areas for best security.