Britool Hallmark 12 piece Fixed Extension Bar Set 1/4", 3/8" & 1/2" - SMLES12

The Britool Hallmark SMLES12 12 Piece Fixed Extension Bar Set is a professional-quality collection designed to provide additional reach while maintaining a rigid, positive drive connection. Manufactured from high-quality Chrome Vanadium steel, these extension bars offer outstanding strength, durability, and dependable performance for automotive, engineering, and workshop applications.

Unlike wobble extensions, this set features a fixed extension design, making it ideal where maximum torque transfer and straight-line drive are required. Each extension bar is fitted with a spring-ball socket retainer, securely holding sockets in place during use while allowing quick and easy socket changes.

The comprehensive set includes 1/4", 3/8", and 1/2" square drive extension bars in a range of popular lengths, making it suitable for everything from precision mechanical work to heavy-duty workshop applications.

Supplied in a precision-cut Tool Control EVA foam tray, every extension has its own dedicated location for organised storage and quick identification. Individual replacement extension bars are also available separately if required. A corresponding wobble extension bar set is available under part reference SMLWES12.

Key Features

• Genuine Britool Hallmark professional quality
• Fixed extension design for straight, positive drive
• Manufactured from high-quality Chrome Vanadium steel
• Spring-ball socket retainers securely hold sockets
• Suitable for automotive, engineering, and workshop use
• Tool Control EVA foam tray for organised storage
• Individual replacement extension bars available
• Matching wobble extension bar set available (SMLWES12)

Set Contents

1/4" Square Drive Extensions

• 50mm
• 75mm
• 100mm
• 200mm

3/8" Square Drive Extensions

• 50mm
• 125mm
• 150mm
• 250mm

1/2" Square Drive Extensions

• 75mm
• 150mm
• 200mm
• 300mm

Specifications

• Brand: Britool Hallmark
• Part Number: SMLES12
• Number of Pieces: 12
• Drive Sizes: 1/4", 3/8" and 1/2" Square Drive
• Design: Fixed Extension Bars
• Material: Chrome Vanadium Steel
• Socket Retention: Spring-Ball Retainer
• Storage: Tool Control EVA Foam Tray
• Foam Tray Dimensions: Approx. 395mm (L) × 184mm (W) × 35mm (D)

Built for Professional Performance

The fixed design ensures direct torque transfer without movement at the socket, making these extension bars ideal for high-torque fastening where wobble extensions are not suitable. Their durable Chrome Vanadium construction provides long service life, while the spring-ball retention system offers secure socket engagement throughout use.

Ideal Applications

Suitable for:

• Automotive servicing and repairs
• Mechanical engineering
• Industrial maintenance
• Heavy equipment servicing
• Workshop and garage use
• Manufacturing and assembly
• Professional technicians
• DIY enthusiasts

Organised Tool Storage

Supplied in a precision-cut Tool Control EVA foam tray, each extension bar is securely stored in its own dedicated position, making tool selection quick and helping to maintain an organised toolbox or roll cab drawer.

The Brand

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 and for the expected life of the tool. 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, moving parts such as ratchet mechanisms or consumable items such as bits and repair kits.