Product Description
The OnGuard Bull Mastiff Round Key Padlock is a compact, heavy-duty security lock built for reliable protection in demanding environments. Its 10mm hardened steel shackle and precision rotary locking mechanism are designed to resist cutting, prying, and leverage attacks while keeping operation simple and fast.

The round-body design helps reduce exposed shackle area, and the tight shackle clearance makes tampering more difficult. With a weather-resistant housing and five included F-style keys, it is a practical security option for gates, chains, lockers, and equipment.

Key Features

Genuine OnGuard Bull Mastiff round keyed padlock
10mm hardened steel shackle
Precision rotary locking mechanism
Twist-to-lock operation for quick one-hand use
Tight shackle clearance helps deter prying and tampering
Compact round-body design for improved security
Weather-resistant metal housing for outdoor durability
Includes 5 heavy-duty F-style keys
Good for gates, chains, lockers, and equipment security

Specifications

Brand: OnGuard
Model: Bull Mastiff
Item Number: 8103
Product Type: Keyed Padlock
Lock Style: Round padlock
Shackle Diameter: 10mm
Shackle Material: Hardened steel
Locking Mechanism: Rotary
Key Type: F-style
Number of Keys Included: 5
Housing: Weather-resistant metal body

Compatibility
Suitable for securing:

Gates
Chains
Lockers
Storage areas
Heavy equipment
General outdoor security applications

Please confirm shackle clearance and fitment for your intended use before purchase.

Included

OnGuard Bull Mastiff round key padlock
5 F-style keys

Warranty and Notes

Tight shackle clearance is designed to reduce pry points
Weather-resistant housing helps improve durability in outdoor conditions
Includes only what is shown or described

Condition

New
Genuine OEM product
Includes only what is shown or described