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Socket 3/8" Drive Metric Deep 12 Pt 21 - NEPROS

Part #: B3L-21W

The NEPROS B3L-21W 3/8" drive deep socket is engineered for professional technicians and mechanics demanding precision and reliability in their daily work. This 21mm metric, 12-point socket is designed to provide secure engagement and exceptional torque transfer, making it an essential addition to any professional toolkit for automotive and industrial applications.

Key Features

  • Professional-Grade Construction: Manufactured by NEPROS, this socket delivers superior strength and longevity, built to withstand the rigors of heavy shop use.
  • 12-Point Design: The 12-point configuration allows for easier fastener engagement at multiple angles, reducing the risk of rounding nuts and bolts, especially in confined spaces.
  • Deep Well Profile: Its deep well design provides the necessary reach to access recessed fasteners and nuts on longer studs, common in engine bays and chassis work.
  • Optimized for Torque: Engineered for optimal power transmission, ensuring efficient tightening and loosening of stubborn fasteners.
  • Corrosion Resistance: Features a durable finish that resists rust and corrosion, extending the life of the tool in demanding environments.

Applications

This 21mm deep 12-point socket is ideal for a wide range of automotive repair tasks, including working on suspension components, engine mounts, transmission housings, and various fasteners found in vehicle undercarriages. It is also well-suited for industrial maintenance, heavy machinery repair, and other applications where metric 21mm fasteners are prevalent and requiring a deep reach and reliable grip.

Only 1 left in stock - order soon

$19.17

Free shipping on orders over $250
Lower 48 states and DC. Excludes freight and oversize items.
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  • Model: 442319
  • Shipping Weight: 0.41lbs
  • UPC: 00498943130231
  • Manufacturers Part #: B3L-21W
  • Manufactured by: NEPROS
  • Also Known As: KTC-B3L-21W

This product was added to our catalog on Saturday 30 May, 2026.

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