1/2-Inch Drive Spline Bit M12, 800mm Length Extension

Brief Overview

This 800mm spline bit extension delivers extended reach for accessing recessed or deeply-seated M12 fasteners in automotive, industrial, and machinery assembly work. The M12 multi-lobe spline profile ensures positive engagement without cam-out, while the 1/2" drive socket end integrates seamlessly with standard impact wrenches and ratchet systems. Whether you're stocking specialized fastener tools or offering extended-reach bit socket sets to your customer base, this extension addresses a critical gap in professional tool kits—delivering precision engagement on spline-drive fasteners that demand both length and reliability.

Key Features

• 800mm Overall Length: Provides deep penetration access for recessed or hard-to-reach fasteners
• M12 Spline Profile: Multi-lobe design prevents slippage and reduces fastener damage during removal or installation
• 1/2" Drive Socket End: Direct compatibility with pneumatic and manual 1/2" drive tools; female square recess for reliable connection
• Matte-Black Hardened Steel Shaft: Flat-faceted construction reduces rotational flex; corrosion-resistant finish supports durability in shop and field environments
• Machined Chrome Socket Fitting: Precision-engineered drive end with stamped identification for tool traceability

Why This Matters for Your Business

Stock Depth & Customer Retention: Long-reach extensions are high-turnover items in professional shops. Customers repeatedly purchase these for specific jobs and keep backups on hand. This length (800mm) fills a gap between standard short bits and specialty extensions, making it a reliable repeat-sale opportunity.

Margin Protection: Spline bit extensions command premium pricing relative to standard hex bits due to their specialized geometry and precision manufacturing. This product category supports healthy gross margins while remaining competitively priced.

Technical Credibility: Offering precision spline extensions signals to your distribution network that you stock professional-grade tools for specialized fastening. Pair this with complete spline bit socket sets to create a tiered product ecosystem.

Technical Specifications

Specification	Detail
Overall Length	800mm
Drive End	1/2" Female Square Drive
Bit Profile	M12 Spline (Multi-Lobe)
Shaft Material	Hardened Steel with Flat Facets
Socket Finish	Chrome-Plated
Fastener Compatibility	M12 Spline-Drive Fasteners
Drive System	Impact-Rated for Pneumatic & Manual Tools

Application Context

This extension is purpose-built for:

• Automotive Service: Removing and installing deep-set fasteners in engine bays, transmission housings, and brake assemblies
• Industrial Assembly: Accessing fasteners in machinery enclosures and structural assemblies where standard bit reach falls short
• Specialized Fastening: M12 spline-drive fasteners commonly found in European automotive and industrial equipment

Note: This is an extension only. Pair with a 1/2" drive impact wrench or ratchet for operation.

Stock Recommendation

For resellers targeting automotive service centers and industrial shops, this 800mm extension should be stocked alongside shorter M12 bit options and general 1/2" drive socket collections. The length specificity makes it a specialized item—stock 3–5 units per distribution point to support customer demand without excess inventory risk.

---

Bottom Line: A precision-engineered, high-margin extension that solves a real problem in professional automotive and industrial work. Easy to stock, easy to sell, and a natural complement to your 1/2" drive tool portfolio.