Britool Hallmark 3/8" Female to 1/4" Male Socket Adapter SPMSSW Chrome

The Britool Hallmark SPMSSW Socket Adapter is a professional-quality drive reducer designed to increase the versatility of your hand socket collection. Manufactured from premium Chrome Vanadium steel, this adapter converts a 3/8" female square drive to a 1/4" male square drive, allowing larger drive ratchets and accessories to be used with 1/4" drive sockets.

Finished in a polished mirror chrome and stamped with the modern Britool Hallmark "The Marque of Skill" branding, this adapter delivers the strength, durability, and precision expected from the Hallmark range. It is ideal for automotive, engineering, and general workshop applications where drive size reduction is required.

This adapter is also available as part of the Britool Hallmark 6 Piece Socket Adapter Set (ADSET6). For collectors and enthusiasts, the original Britool England version remains available while stocks last under part number SPMS/A.

Key Features

• Genuine Britool Hallmark quality
• Part Number: SPMSSW
• Converts 3/8" Female drive to 1/4" Male drive
• Manufactured from premium Chrome Vanadium steel
• Mirror chrome finish for corrosion resistance
• Features the modern "The Marque of Skill" branding
• Compatible with all standard 3/8" and 1/4" square drive hand tools
• Available individually or as part of the ADSET6 adapter set

Specifications

• Brand: Britool Hallmark
• Part Number: SPMSSW
• Female Drive: 3/8" Square Drive
• Male Drive: 1/4" Square Drive
• Material: Chrome Vanadium Steel
• Finish: Mirror Chrome
• Application: Hand Tool Use Only

Expand Your Socket System

This adapter allows 3/8" drive ratchets, extension bars, and other accessories to be used with 1/4" drive sockets, increasing the versatility of your existing tool collection while reducing the need for additional drive-specific tools.

Ideal for use with:

• Ratchets
• Extension bars
• Breaker bars
• Torque wrenches
• Speed braces

Ideal Applications

Suitable for:

• Automotive servicing
• Mechanical repairs
• Engineering workshops
• Industrial maintenance
• Agricultural machinery
• General workshop use
• Professional technicians
• DIY enthusiasts

Hand Tool Use Only

This socket adapter is designed for manual hand tool use only.

Not suitable for use with impact wrenches, cordless impact drivers, air tools, or pneumatic equipment. Use with powered tools may result in damage and may void the manufacturer's 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 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.