# OnGuard 8019 Mastiff 10mm Chain Lock, 3.5 ft

OnGuard 8019 Mastiff is a chain lock listed with 10 mm links and a 3.5-foot chain, paired with a Boxer U-lock according to the feature text. Its chain cover is described as helping protect painted surfaces and allowing compact coiling.

- [Original product page](https://loonieperks.com/product/onguard-8019-mastiff-chain-lock)
- [View offer](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- Market: CA
- Language: en-CA
- Currency: CAD
- Brand: OnGuard
- Model: 8019
- Category: Sports & Outdoors > Cycling > Bicycle Parts & Accessories
- Price: 98.75 CAD
- Previous price: 123.44 CAD
- Discount: 20%
- Price checked: 2026-11-13T12:31:23.180Z
- Rating: 4.5 / 5
- Reviews: 478

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The feature text identifies a 3.5-foot chain with 10 mm hexagonal steel links, presented as resistant to saws and cutters.
- A sleeve over the crossbar and cylinder is claimed to add protection, while the cylinder is described as designed to resist physical attack and picking.
- The chain cover is described as water- and heat-resistant, protective of painted surfaces and suitable for compact coiling. A rotating dust cover is also listed.

## Pros

- The stated 3.5-foot chain length and compact-coiling cover may suit buyers needing a chain that can be stored in a smaller space.
- The listing describes a covered chain intended to reduce scratching of painted surfaces.

## Specifications

### Identity
- Brand: OnGuard
- Model: 8019
### Lock details
- Lock type: Chain Lock
- Listed form factor: U Shape
- Material listed: Titanium Alloy Steel
- Finish: Powder Coated
- Colour: Black/Yellow
- Pieces: 1
### Dimensions and weight
- Dimensions listed: 106.7 x 1 x 1 centimetres
- Weight listed: 916 g
### Connectivity and controls
- Wireless connection listed: Wi-Fi
- Control method listed: Touch

## Before you buy

- Listing details are contradictory or inconsistent: the title and feature text describe a chain lock with a Boxer U-lock, while the included-components field names a U Lock and the details also list Wi-Fi, Touch controls and a U-shaped form factor. Confirm the selected listing’s lock configuration and relevant dimensions before buying. The 10 mm link size and 3.5-foot length come from the feature text, while the dimensions table gives 106.7 x 1 x 1 centimetres. The listed material wording is also unusual and does not establish a specific alloy composition.

## In the box

- U Lock (Included): The manufacturer’s included-components field lists this item, though the listing also describes a Boxer U-lock. Confirm the selected package.

## A good fit for

- Cyclists or powersports users wanting a chain lock with a stated 3.5-foot reach and protective covering.
- Buyers who want the listing’s claimed combination of chain and U-lock, after confirming the selected package.

## Less suited to

- Buyers who need a confirmed lock configuration or package without checking the listing’s conflicting lock descriptions.
- Anyone prioritizing minimal carry weight, as the listed weight is 916 g and customer feedback is mixed about weight.

## Customer feedback

Customer feedback describes the lock as sturdy and functional, with positive comments about durability and ease of use. Some customers raise concerns about key accessibility, while opinions on weight and value are mixed. For buyers considering this listed 916 g lock, those reports make carrying burden and access to the key worth weighing alongside the stated chain length. Aggregate ratings lean positive but do not establish performance for a particular use.
- Positive themes: Feedback describes the lock as sturdy and functional.
- Positive themes: Customer feedback is positive about durability and ease of use.
- Negative themes: Feedback includes concerns about key accessibility.
- Mixed feedback: Customer opinions are mixed about weight and value for money.

## Frequently asked questions

### What chain length does the listing describe?
The title and feature text give a length of 3.5 feet. The dimensions field separately lists 106.7 x 1 x 1 centimetres, so confirm the intended dimensions if fit or reach is critical.
### Does this package include a U-lock?
The feature text claims a Boxer U-lock and the included-components field says U Lock, but the product details are inconsistent. Check the selected listing to confirm what is supplied.
### What do customers report about using this lock?
The supplied feedback describes the lock as sturdy and functional, while noting concern about key accessibility and mixed views on weight and value.

## Alternative options

- [OKG Ultra Security Chain - 4ft x 1/2in \(12mm\) Thick Hardened Alloy Steel Cut Proof Chain - Anti-Theft Heavy Duty Chain for Motorcycles, E-Cargo Bikes, Trailers, Gate Fences, and Garage Security](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [WARLION Heavy Duty Security Chain, 3ft x 3/8in Thick, 3.8lbs, Anti-Theft & Cut-Proof Motorcycle Chain with Cinch Ring - Secure Generators, Trailers, ATVs, Ebikes, & 2-Wheeled Vehicles \(No Lock\)](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [Solid Alarm Chain Lock Series ZCL10-120 - 120 db Alarm, 10mm Steel Chain, Anti-Drill, Nylon Cover, Corrosion Resistant, Anti-Theft, Art Accredited, Cut Resistant](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
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- [OKG Heavy Duty Chain Lock, 3.3 ft x 1/2 inch Thick Hexagonal Cinch Ring Security Chain with 18mm Hardened Alloy Steel Small U Lock for Motorcycles, Mopeds, Bikes, Trailers, Scooters, and More](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [OKG Ultra Security Chain - 5.3 ft x 10mm \(3/8"\) Thick Heavy Duty Cut Proof - Hardened Alloy Steel Anti Theft for Motorcycles, Bikes, Trailers, ATVs and Properties](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [Steel Thunder Lock Series KCQ12-120 db Alarm, 12mm Steel Chain, Anti-Drill, Nylon Cover, Corrosion Resistant, Anti-Theft, Art Accredited, Cut Resistant](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [MEINUOKA 3 Feet Hardened Steel Security Chain, 3/8" Thick Heavy Duty Square Link Anti-Theft Chain for Bikes, Motorcycles, Trailers, ATV, Ebikes – Cut & Prying Resistant](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [Solid Alarm Chain Lock ZCH-005 – 120 dB Alarm, Nylon-Covered 6 mm Steel Chain, Anti-Drill & Corrosion-Resistant, 600 mm, Ideal for Bikes and Scooters](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [Solid Alarm Chain Lock Series ZCL8-120 db Alarm, Nylon Cover, Anti-Drill, Corrosion Resistant, Anti-Theft, Cut Resistant, 8mm Steel Chain, 1000mm Length](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [ABUS Goose Lock Chain Lock - Flexible Rattle Free Hardened Steel Bicycle Lock - 6mm Thick - 110cm Long - with Key - Light Green](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)
- [ZOVII Noisy Cat Lock Series ZCG08 Alarm Chain Lock – 120dB Anti-Theft Security, 8mm Hardened Steel Chain, 1000mm Length, Weatherproof for Bikes, E-Scooters & Motorcycles](https://loonieperks.com/visit/onguard-8019-mastiff-chain-lock)

## Images

![OnGuard 8019 Mastiff 10mm Chain Lock, 3.5 ft — 1](https://loonieperks.com/i/jkg6fwa2Ix8fo2al6X-d2aLU_9K5IJyENAx75Du9x8vH7hI42-gK5SdovDRc0_6cxxli3X7FyqjwqV5q4fZp_PR0XaU1Kj66e4EwrNWoNPHBaz4Jh3cmLJCd.jpg)