Product Description
3/8" Drive Breaker Bar / Power Bar – 450mm | Britool Hallmark
Professional 450mm Breaker Bar for Extra Leverage
The Britool Hallmark 3/8" Drive Breaker Bar is a professional-quality hand tool designed to provide additional leverage when loosening tight, seized, rusted or stubborn nuts and bolts.
Also commonly known as a power bar, knuckle bar or flex handle, this breaker bar combines a practical 450mm overall length with a hinged 3/8" drive knuckle. It is ideal for automotive repairs, motorcycle maintenance, mechanical servicing and general workshop applications where a standard ratchet does not provide enough leverage.
Manufactured from high-quality Chrome Vanadium (Cr-V) steel, it offers the strength and durability required for regular professional use.
Key Features
- 3/8" square drive for use with compatible sockets
- 450mm overall length for increased leverage
- Hinged knuckle head for flexible working angles
- Ideal for loosening tight, seized and stubborn fasteners
- Manufactured from high-quality Chrome Vanadium steel
- Provides greater leverage than a conventional 3/8" ratchet
- Suitable for professional mechanics and technicians
- Ideal for automotive, motorcycle and general mechanical work
- Also known as a power bar, breaker bar or knuckle bar
- Professional-quality Britool Hallmark tool
450mm Length for Increased Leverage
At 450mm long, this breaker bar provides substantially more leverage than a conventional 3/8" drive ratchet.
The extended handle allows greater torque to be applied with less effort, making it particularly useful when tackling stubborn fasteners without immediately needing to move up to a larger 1/2" drive tool.
Its 450mm length provides an excellent balance between leverage, control and accessibility, making it particularly useful for everyday automotive workshop applications.
Hinged 3/8" Drive Knuckle
The flexible hinged knuckle allows the socket angle to be adjusted relative to the handle, helping the user find a more convenient working position when access is restricted or the fastener is positioned at an awkward angle.
The standard 3/8" square drive provides compatibility with a wide range of commonly used metric and imperial 3/8" drive sockets.
Chrome Vanadium Steel Construction
Manufactured from high-quality Chrome Vanadium steel, the Britool Hallmark breaker bar is engineered to provide the strength, durability and wear resistance required for regular workshop use.
This robust construction makes it a dependable addition to a professional mechanic's, technician's or engineer's tool collection.
Ideal for Automotive & Mechanical Repairs
The combination of a 3/8" drive and 450mm handle makes this breaker bar particularly useful for medium-duty automotive applications where extra leverage is needed but a larger 1/2" or 3/4" drive breaker bar may be unnecessary.
It is well suited to working on brakes, suspension components, engine fasteners and general mechanical assemblies.
Technical Specifications
Brand: Britool Hallmark
Tool Type: Breaker Bar / Power Bar / Knuckle Bar
Drive Size: 3/8" Square Drive
Overall Length: 450mm
Head Type: Hinged Knuckle
Material: Chrome Vanadium Steel
Operation: Manual
Application: Automotive, motorcycle, mechanical and workshop use
Typical Applications
The Britool Hallmark 450mm breaker bar is suitable for:
- Automotive servicing and repairs
- Motorcycle maintenance
- Brake and caliper fasteners
- Suspension components
- Engine and gearbox fasteners
- General mechanical repairs
- Garage and workshop maintenance
- Engineering applications
- Seized and corroded nuts and bolts
- Fasteners requiring greater leverage than a standard ratchet
Socket Compatibility
The breaker bar features a standard 3/8" square drive and can be used with suitable 3/8" drive sockets.
Both standard hand sockets and appropriately rated impact sockets can be used manually with the bar. Always ensure the socket and any accessories are suitable for the load being applied.
Stamped with the modern "The Marque of Skill" branding.
Replacement knuckle repair kit is available (MP450/RK).
EAN: 5060960270849.
The HALLMARK range was developed by Britool in the 80's for the automotive aftermarket. it has been the professional’s choice ever since. Each tool is marked with the Britool hallmark 
, your guarantee of quality.
The Britool Hallmark guarantee covers against defective materials and/or workmanship when used for the purpose for which they were designed. In the unlikely event that a product fails during normal use, it will be repaired or replaced. The guarantee does not extend to fair wear & tear or moving parts such as ratchet mechanisms.