21mm Spline Drive Socket for Damaged Fasteners

Overview

This 21mm spline drive socket is engineered to extract and turn damaged, stripped, or rounded fasteners where conventional sockets fail. The multi-lobed internal profile grips compromised bolt heads securely, making it an essential recovery tool for professional mechanics and maintenance shops. Available as a standalone unit or as part of a larger multi-size spline socket set, it complements your existing socket collection with critical extraction capability.

Key Features

• Spline Drive Profile: Multi-lobed internal design grips stripped and rounded fastener heads where standard sockets slip
• Black Oxide Finish: Durable, corrosion-resistant coating for extended tool life in demanding shop environments
• Hexagonal Outer Body: Six-faceted grip surface for secure engagement with standard wrenches and ratchets
• Impact-Grade Construction: Hardened steel body withstands high-force extraction applications
• Compact Design: Short profile minimizes interference in tight work spaces while maintaining structural integrity

Why Resellers Choose This Socket

Damaged fastener extraction is a recurring revenue opportunity. This socket addresses a genuine pain point—mechanics encounter stripped bolts regularly and need reliable recovery tools. The 21mm size covers mid-range fastener applications across automotive, industrial, and maintenance sectors. Stock this alongside other spline sizes to build a complete offering and increase customer attachment rates.

Technical Specifications

Specification	Detail
Socket Size	21 mm
Drive Type	Spline (Multi-lobed internal profile)
Outer Body	Hexagonal (6-facet) grip surface
Material	Hardened steel
Finish	Black oxide
Application	Stripped, rounded, and damaged fastener removal
Compatibility	Standard wrenches and ratchets via hex grip

Bottom Line

This 21mm spline socket fills a critical gap in any professional toolkit. Position it as an essential recovery tool that keeps jobs moving when standard sockets fail—and captures margin on a product mechanics will keep coming back for.