Impact Socket 12-Point 21mm 1/2-Inch Drive, Chrome-Moly Construction

Brief Overview

This 21mm impact socket is engineered for professional mechanics and technicians who demand durability under high-torque pneumatic and electric impact conditions. Built from chrome-molybdenum steel, it withstands repeated shock loads without cracking or deforming. The 12-point internal geometry provides optimal contact with fastener heads, reducing cam-out and rounding. Whether you're stocking a mobile service unit or outfitting a workshop, this socket pairs seamlessly with smaller metric sockets or larger companion sizes to complete a comprehensive 1/2-inch drive set.

Key Features

• Chrome-Molybdenum Construction: High-strength alloy resists impact fatigue and maintains structural integrity through thousands of cycles
• 12-Point Socket Geometry: Engages fastener heads at multiple angles, minimizing slip and rounding
• 1/2-Inch Square Drive: Industry-standard connection; compatible with all 1/2" impact wrenches, ratchets, and adapters
• Retaining Pin Hole: Integrated through-hole near the base allows use of retaining rings or clips to prevent accidental socket loss
• Compact Profile: 38mm overall length fits tight engine bays and restricted work spaces without sacrificing strength
• Matte Impact-Grade Finish: Durable surface coating resists corrosion and absorbs impact vibration

Technical Specifications

Specification	Value
Socket Size	21 mm
Drive Type	1/2-Inch Square Drive
Point Count	12-Point
Material	Chrome-Molybdenum Steel
Outer Diameter (D1)	30 mm
Maximum Diameter (D2)	30 mm
Wall Thickness (T)	13 mm
Overall Length (L)	38 mm
Model Number	525621P

Business Advantages for Resellers

This socket addresses a critical size gap in professional toolkits—the 21mm is frequently required for modern automotive work (suspension fasteners, hub nuts, brake components) yet often missing from budget socket sets. The robust chrome-moly construction means fewer warranty returns and repeat purchases from satisfied technicians. Stock this alongside complementary mid-range sizes to drive attach sales and build customer loyalty with a reliable, branded socket offering.

Why This Socket Matters

The 21mm impact socket is not a niche product—it's a high-turnover staple in any serious workshop. Its ability to handle both pneumatic and cordless impact drivers without deformation makes it indispensable for production environments where tool failure translates directly to downtime costs. The 12-point profile is particularly valuable on older, worn fasteners where rounded edges are common; the multiple contact points maintain grip where a 6-point socket would slip.

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Ready to stock a complete 1/2-inch impact socket range? This 21mm model integrates seamlessly into your catalog and supports bulk ordering for fleet maintenance programs and industrial supply contracts.