Onguard Mastiff 8021 Chain Lock - 6 FT

Onguard Mastiff 8021 is a 6-foot hardened chain lock with 10mm titanium-reinforced square links and dual X2P cylinder locks, designed for securing V-twin cruisers and touring bikes. Includes five laser-cut keys (one with built-in LED light) and a protective double rubber cover to prevent frame damage.

Features

• 6-foot length with 10mm titanium-reinforced hardened chain
• Dual X2P cylinder locks for added security
• Double rubber cover protects bike finish
• 5 laser-cut keys including 1 micro-light LED key
• Integrated lock head stays attached to chain

Specifications

• Brand: Onguard
• Manufacturer Part #: 45008021
• UPC: 768661280215
• Chain Length: 6 feet (approximately 110cm)
• Chain Diameter: 10mm (0.39 inches)
• Weight: 10.201 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles including Harley-Davidson and Indian Motorcycle models. Works with frame loops, swingarms, and fixed anchor points.

Frequently Asked Questions

How many keys come with the lock?

Five laser-cut keys: one with a built-in micro-light LED flashlight and four standard grip keys for everyday use and spares.

Will this fit around my frame and a fixed post?

Yes — the 6-foot length accommodates most frame geometries and anchor points. Measure your routing path before purchase to confirm fit.

Does the rubber cover protect my paint?

Yes — the double rubber cover is designed to cushion the chain against your frame and prevent scratches and dings during storage and transport.

What makes the X2P lock secure?

X2P is Onguard's dual-cylinder locking system that resists picking and drilling. The hardened chain resists cutting by standard tools.

Is the lock weatherproof?

The lock and chain are built to resist corrosion, but store out of prolonged rain when possible to extend its life.