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Socket 1/2" Drive Metric Deep 12 pt 21 - NEPROS

Part #: B4L-21W

The NEPROS B4L-21W 1/2" Drive Metric Deep 12 pt 21mm Socket is meticulously engineered for professional technicians and mechanics who require precision, durability, and optimal access. This deep, 12-point socket delivers superior fastener engagement and reliable performance across diverse automotive and industrial applications, embodying the renowned quality synonymous with NEPROS tools.

Key Features

  • N-PowerFit Design: Engineered with NEPROS's proprietary N-PowerFit shape, this socket maximizes contact area with fasteners, distributing stress evenly to minimize the risk of rounding corners and ensuring secure torque application.
  • Exceptional Dimensional Accuracy: Manufactured to the highest standards with near-zero tolerances, this socket provides an optimal fit that significantly reduces play, enhancing grip and fastener integrity.
  • Deep Well Configuration: The extended deep well design offers crucial reach for fasteners located on long studs or within recessed areas, greatly improving accessibility in complex or restricted workspaces.
  • Versatile 12-Point Profile: The 12-point configuration allows for quick and effortless engagement from multiple angles, requiring only a 30° rotation for repositioning, which is particularly beneficial when working in confined spaces with limited swing room.
  • Professional-Grade Durability: Constructed from premium steel and finished with a proprietary hard chrome plating, this socket delivers outstanding resistance to wear, corrosion, and contributes to its exceptional mirror finish.

Applications

The NEPROS B4L-21W 21mm deep 12-point socket is an indispensable tool for professional automotive maintenance and repair. It excels in tasks requiring access to deeply set nuts or bolts, such as specific suspension components, engine accessory mounting, or certain wheel fastening applications. Its 12-point design also makes it highly effective in aerospace and light assembly work where fast engagement and maneuverability in tight, poorly visible areas are paramount. This socket is optimized for use with hand tools, ensuring consistent and reliable performance without compromising the integrity of the fastener.

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  • Model: 442544
  • Shipping Weight: 0.57lbs
  • UPC: 00498943135366
  • Manufacturers Part #: B4L-21W
  • Manufactured by: NEPROS
  • Also Known As: KTC-B4L-21W

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