Britool Hallmark 3/8" Drive Impact Socket Set Twin Pack Standard & Deep 6-24mm

The Britool Hallmark 3/8" Drive Impact Socket Set Twin Pack combines both standard and deep impact sockets in one professional-quality package, providing a comprehensive solution for automotive, engineering, and industrial fastening applications. Manufactured from premium Chrome Molybdenum (Cr-Mo) steel, these sockets are designed to withstand the high torque and repeated shock loads generated by pneumatic impact wrenches, cordless impact tools, and other professional equipment.

Each set includes a full range of 6-point hexagon impact sockets from 6mm to 24mm, giving excellent coverage for the most commonly used metric fasteners. The deep sockets provide additional reach for recessed fasteners and threaded studs, while the standard sockets offer maximum strength for everyday applications.

Featuring Britool's Stress Relief Drive profile, the sockets apply torque to the stronger areas of the fastener rather than the corners, helping to reduce fastener wear and minimise rounding under heavy loads. Precision-machined ball retaining grooves ensure a secure fit on all 3/8" drive accessories, while the cross-drilled retaining hole allows optional use with a pin and ring for additional security on impact tools.

Each set is supplied in its own Tool Control EVA foam tray, allowing both sets to fit neatly into toolbox drawers while keeping every socket organised, protected, and easy to identify. Every socket is laser marked with the Britool Hallmark logo and individual part number for professional tool control. Individual replacement sockets are also available separately if required.

Key Features

• Genuine Britool Hallmark quality
• Twin pack including both standard and deep impact socket sets
• 3/8" square drive
• Professional 6-point (hexagon) impact sockets
• Manufactured from premium Chrome Molybdenum (Cr-Mo) steel
• Britool Stress Relief Drive reduces fastener wear
• Heat treated for maximum strength and durability
• Ball retaining groove for secure socket retention
• Cross-drilled retaining hole for optional pin and ring
• Suitable for pneumatic, cordless, and impact tools
• Laser marked with Hallmark branding and part numbers
• Individual replacement sockets available

Set Contents

Both standard and deep socket sets include the following metric sizes:

• 6mm
• 7mm
• 8mm
• 9mm
• 10mm
• 11mm
• 12mm
• 13mm
• 14mm
• 15mm
• 16mm
• 17mm
• 18mm
• 19mm
• 20mm
• 21mm
• 22mm
• 23mm
• 24mm

Specifications

• Brand: Britool Hallmark
• Drive Size: 3/8" Square Drive
• Socket Type: Standard & Deep Impact Sockets
• Profile: 6-Point (Hexagon)
• Size Range: 6mm–24mm
• Material: Chrome Molybdenum Steel (Cr-Mo)
• Finish: Black Impact Finish
• Retaining Features: Ball Groove & Pin/Ring Hole
• Storage: Two Tool Control EVA Foam Trays

Built for Heavy-Duty Performance

Manufactured for professional use, these impact sockets are engineered to cope with demanding, high-torque applications while maintaining precise fastener engagement. The Stress Relief Drive design improves torque transfer and helps extend both socket and fastener life.

Ideal Applications

Suitable for:

• Automotive servicing and repairs
• Commercial vehicle maintenance
• Engineering workshops
• Industrial maintenance
• Agricultural machinery
• Heavy plant equipment
• Professional mechanics
• General workshop use

Compatible with all standard 3/8" square drive impact accessories.

Professional Tool Control Storage

Each socket set is supplied in its own precision-cut Tool Control EVA foam tray, allowing quick identification, secure storage, and easy organisation within professional toolbox drawers.

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.