3/8-Inch Drive 12-Point Long Hand Socket, 8mm to 24mm Sizes

Brief Overview

This 3/8-inch drive 12-point long hand socket is engineered for precision work in confined spaces and detailed assembly applications. The extended length and 12-point geometry provide superior contact with fasteners, reducing rounding and cam-out—critical advantages when working with metric hardware in tight access areas. Available in 17 sizes from 8mm to 24mm, these sockets are ideal for building complete mechanic's kits or stocking specialty toolboxes. For customers seeking related options, consider pairing with extended socket sets or deep-access variants for maximum versatility.

Key Features

• 12-Point Design: Engages fasteners at 12 contact points, minimizing cam-out and reducing fastener damage—essential for precision work and delicate fastener heads
• 3/8-Inch Drive: Industry-standard drive size compatible with all 3/8" ratchets, extensions, and torque wrenches
• Long Format: 63mm overall length provides extended reach into recessed or hard-to-access fasteners
• Knurled Grip Ring: Molded grip band near the drive end improves handling and reduces slipping during manual operation
• Hardened Steel Construction: Durable, corrosion-resistant satin chrome finish withstands workshop conditions and frequent use
• Metric Range: 17 individual sizes spanning 8mm to 24mm, covering standard automotive and industrial fastening applications
• Spring-Ball Detent: Integrated retention system keeps socket securely attached to extensions and ratchet handles

Technical Specifications

Size (mm)	D1 (mm)	D2 (mm)	T (mm)	L (mm)	Part Code
8	11.8	17	9	63	543208
9	13.2	17	9	63	543209
10	14.5	17	9	63	543210
11	15.7	17	12	63	543211
12	17	16	12	63	543212
13	18	16.5	12	63	543213
14	19.6	17	15	63	543214
15	20.9	18	15	63	543215
16	22	19	15	63	543216
17	23.4	20	15	63	543217
18	24.6	21	18	63	543218
19	26	23	18	63	543219
20	27.1	24	18	63	543220
21	28	25	18	63	543221
22	29.6	26	21	63	543222
23	31.6	27	21	63	543223
24	32	28	21	63	543224

Legend:

• Size: Fastener size in millimeters
• D1: Drive end outer diameter (mm)
• D2: Open end outer diameter (mm)
• T: Socket thickness (mm)
• L: Overall length (mm)

Business Advantages for Resellers

• Complete Range Availability: 17-piece metric selection covers 95% of standard automotive and machinery fastening applications—stock this as a standalone set or complement existing tool kits
• Professional-Grade Quality: Hardened steel and precision machining justify retail positioning alongside premium brands; durable construction means minimal warranty claims
• High Turnover Potential: Long hand sockets are consumable in professional shops—mechanics regularly need replacement sockets due to wear, damage, or lost pieces
• Accessible Price Point: Competitive bulk pricing at distributor level allows healthy retail margins while remaining attractive to price-conscious professionals
• Modular Stocking: Purchase individual sizes or the complete set; flexibility supports both full-kit sales and individual replacement orders
• Universal Compatibility: 3/8-inch drive is the most common workshop standard—fits seamlessly into existing customer tool collections

Recommended Use Cases

• Precision Assembly Work: Engine rebuilds, transmission service, and detailed mechanical work where fastener protection is paramount
• Confined Space Access: Recessed engine bays, intricate machinery, and tight panel work where extended socket length reaches fasteners others cannot
• Metric Fastening: Automotive service, industrial equipment maintenance, and imported machinery where metric hardware is standard
• Detail and Specialty Work: Instrumentation, delicate assembly, and applications where fastener damage must be avoided

Why This Socket Outperforms Single-Point Alternatives

The 12-point geometry engages fasteners across a broader contact surface than 6-point designs, dramatically reducing the risk of rounding and cam-out—particularly valuable when working with softer metals, damaged fastener heads, or fasteners in high-vibration environments. The extended 63mm length provides mechanical advantage and reach into recessed fasteners, making it indispensable for modern automotive service where access is increasingly constrained.

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Stock this essential socket range to build customer loyalty, increase basket size, and capture recurring demand for precision hand tools.