21151 M15 Hex Key Set – 3 mm to 10 mm, Classic Steel Handle, 6 Pieces

Product Overview

The 21151 M15 Hex Key Set is a durable and efficient metric tool solution designed for users who require strength, precision, and convenience in a compact format. This 6‑piece metric hex key set features commonly used sizes ranging from 3 mm to 10 mm, integrated into a folding design with a classic steel handle for enhanced durability and torque control.

Ideal for professional technicians and serious DIY users, this folding hex key set keeps essential sizes organized in one tool, reducing clutter and minimizing the risk of lost keys. Precision‑formed hex ends ensure accurate fastener engagement, making the M15 set a reliable choice for assembly, maintenance, and repair tasks across a wide range of applications.

Key Features

• Metric hex key set covering popular sizes from 3 mm to 10 mm
• Classic steel handle for strength, rigidity, and long service life
• Folding design keeps keys organized and protected
• Precision‑machined hex ends for accurate fastener fit
• Compact and portable for easy transport and storage
• Provides improved leverage and control compared to loose hex keys
• Designed for professional, industrial, and home use
• Durable construction suitable for repeated, demanding use

Specifications (Manufacturer Provided)

• Model: 21151
• Tool Type: Metric Hex Key Set
• Configuration: Folding hex key set
• Number of Pieces: 6
• Hex Sizes Included:
  • 3 mm
  • 4 mm
  • 5 mm
  • 6 mm
  • 8 mm
  • 10 mm
• Handle Material: Steel
• Measurement System: Metric
• Finish: Corrosion‑resistant steel construction
• Design: Fold‑out hex keys with integrated classic steel handle

Applications

The 21151 M15 Hex Key Set is designed for a wide range of metric fastener applications, including:

• Equipment assembly and installation
• Automotive and motorcycle maintenance
• Industrial machinery service
• Bicycle repair and adjustment
• Appliance and electronics repair
• Furniture and fixture assembly
• Workshop, garage, and field service use

Its folding design makes it especially useful for technicians and installers who need quick access to multiple metric sizes in a single, compact tool.

Performance & Durability

Each hex key is precision‑formed to ensure a secure fit within fasteners, reducing the risk of rounding or slippage. The classic steel handle provides added strength and rigidity, allowing controlled torque application for demanding tasks. Built for durability, this set is designed to withstand frequent use in professional and industrial environments.

Design & Convenience

The folding configuration keeps all six hex keys neatly stored in one tool, improving organization and portability. Keys fold out smoothly for use and store safely within the handle when not in use. The slim profile fits easily in toolboxes, service bags, or pockets, making it ideal for mobile technicians and everyday carry.

Ideal For

• Professional technicians and mechanics
• Maintenance and service personnel
• Installers and assemblers
• Industrial and commercial users
• DIY homeowners and hobbyists
• Toolkits requiring compact metric hex solutions