Britool Hallmark 20pc 3/8" Drive Hex Allen Bit Socket Set 3-12mm Standard & Long

The Britool Hallmark 20 Piece 3/8" Drive Hex (Allen) Bit Socket Set is a professional-quality solution for automotive, engineering, industrial, and workshop applications. Manufactured for strength, precision, and long service life, this comprehensive set combines both standard and long-reach hex bit sockets to tackle a wide variety of fastening tasks.

Each socket features a precision-machined S2 steel male hex (Allen) bit securely fixed into a durable chrome socket, providing outstanding wear resistance and reliable torque transfer. The set includes both 48mm standard and 95mm long bit sockets, giving excellent access to both standard and recessed fasteners.

Covering hex sizes from 3mm to 12mm, this versatile set accommodates the majority of common metric Allen fasteners used in automotive, machinery, and engineering applications.

Each socket is stamped with the distinctive Britool Hallmark "B" logo and its individual part number for easy identification and guaranteed authenticity. Individual replacement sockets are also available separately if required.

Supplied in a precision-cut Tool Control EVA foam tray, every component is securely organised for quick identification and convenient storage in a toolbox or roll cab drawer.

Key Features

• Genuine Britool Hallmark professional quality
• 20-piece 3/8" square drive hex bit socket set
• Precision-machined S2 steel hex (Allen) bits
• Durable polished chrome sockets
• Includes both standard and long bit sockets
• Excellent wear resistance and torque transfer
• Laser marked with Britool Hallmark branding and part numbers
• Supplied in Tool Control EVA foam
• Individual replacement sockets available separately

Set Contents

Standard Length Bit Sockets (48mm)

• 3mm
• 4mm
• 5mm
• 6mm
• 7mm
• 8mm
• 9mm
• 10mm
• 11mm
• 12mm

Long Length Bit Sockets (95mm)

• 3mm
• 4mm
• 5mm
• 6mm
• 7mm
• 8mm
• 9mm
• 10mm
• 11mm
• 12mm

Professional Performance

The combination of standard and extended-length sockets provides outstanding versatility for both everyday servicing and difficult-to-reach fasteners. High-quality S2 steel bits ensure maximum durability and accurate engagement, helping to reduce wear on both the tool and the fastener.

Complete Your Bit Socket Collection

Individual replacement bit sockets are available separately when required.  A 22 piece torx bit socket set is also available - M2BTXSET22 and also a 22 piece standard and ball ended long hexagon bit socket set - M2BSET22.

Ideal Applications

Suitable for:

• Automotive servicing and repairs
• Mechanical engineering
• Industrial maintenance
• Motorcycle maintenance
• Machinery servicing
• Workshop repairs
• Professional technicians
• DIY enthusiasts

Organised Tool Storage

The complete set is supplied in a precision-cut Tool Control EVA foam tray, keeping every socket securely organised, protected, and easy to locate while fitting neatly into most toolbox drawers.

Please Note

These bit sockets are designed for hand tool use only. They are not suitable for use with impact wrenches, pneumatic tools, or electric power tools, as doing so may damage the sockets and void any applicable warranty.

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, for the expected life of the tool (T's & C's apply). 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 or consumable parts such as bits and repair kits.