1/4-Inch Drive Extension Bar, 400mm Length, Chrome Vanadium Steel

Overview

This 400mm extension bar is engineered for professional mechanics and technicians who require extended reach on precision fastening tasks. Built from chrome vanadium steel with a polished chrome finish, it delivers the durability and corrosion resistance demanded in high-volume shop environments. The straight design eliminates flex during operation, making it ideal for applications where accuracy matters. For shops requiring additional versatility, consider pairing this with shorter extension options or flexible alternatives to cover the full range of access scenarios.

Key Features

• Chrome Vanadium Construction: Stamped alloy designation ensures material traceability and consistent hardness for reliable performance under load.
• 1/4" Drive Compatibility: Female square recess on one end, male square drive on the opposite end with retaining pin hole for secure fitment.
• 400mm Extended Reach: Provides substantial reach for recessed or deeply positioned fasteners without requiring multiple tool changes.
• Polished Chrome Finish: Resists corrosion and simplifies cleaning between jobs; maintains appearance under typical shop conditions.
• Straight Design: Eliminates wobble and flex, ensuring precise socket engagement and reducing cam-out risk.
• Professional-Grade Detailing: Chamfered ends and rounded drive corners reduce snagging and extend tool lifespan.

Business Advantages for Resellers

• High-Demand Length: The 400mm extension is a workhorse size in automotive and industrial repair—drives consistent sales volume.
• Bulk Order Profitability: Chrome vanadium construction at this length supports strong margin profiles; competitive pricing on volume orders maximizes turnover.
• Essential Tool Gap-Filler: Shops stocking only short extensions (75–150mm) will recognize the need for mid-to-long reach; this fills that critical gap.
• Durability = Repeat Orders: Chrome vanadium resists damage, reducing premature replacement—but when upgrades occur, customers return for the same trusted specification.
• Upsell Potential: Pair with shorter 1/4-inch drive extensions to build a complete extension kit offering.

Technical Specifications

Specification	Value
Drive Size	1/4 inch square drive
Overall Length	400 mm
Material	Chrome Vanadium Steel
Finish	Polished Chrome
Drive Configuration	Straight (non-flexing)
Recess Type	Female socket end / Male drive end
Retaining Pin	Yes (pre-drilled)

Closing Value Statement

At 400mm, this extension bar bridges the gap between compact hand-tool kits and specialty deep-reach solutions. Its chrome vanadium construction and proven industrial design make it a stock essential for any professional shop servicing tight engine bays, recessed switch panels, or equipment housings. Buy in bulk and establish this length as a standard offering—it pays for itself through consistent, predictable demand.