21171 M17 Hex Key Set – 1.5 mm to 6 mm, Classic Steel Handle, 7 Pieces

Product Overview

The 21171 M17 Hex Key Set is a compact, durable, and efficient solution for metric fastener applications requiring precision and convenience. This 7‑piece metric hex key set combines the most commonly used sizes into a single folding tool with a classic steel handle, offering strength, reliability, and ease of use for both professional and everyday tasks.

Designed for portability and performance, the M17 folding hex key set keeps all keys securely housed in one tool, reducing tool loss while improving workflow efficiency. Precision‑formed hex keys ensure a proper fit in fasteners, allowing consistent torque transfer and minimizing the risk of rounding or slippage during use.

Key Features

• Metric hex key set with commonly used sizes
• Includes sizes from 1.5 mm to 6 mm
• Classic steel handle for strength and long service life
• Folding design keeps keys organized and protected
• Precision‑machined hex ends for accurate fastener engagement
• Compact and portable for toolboxes, pockets, or service kits
• Provides improved leverage and control compared to loose keys
• Designed for professional, industrial, and home use

Specifications (Manufacturer Provided)

• Model: 21171
• Tool Type: Metric Hex Key Set
• Configuration: Folding hex key set
• Number of Pieces: 7
• Hex Sizes Included:
  • 1.5 mm
  • 2 mm
  • 2.5 mm
  • 3 mm
  • 4 mm
  • 5 mm
  • 6 mm
• Handle Material: Steel
• Measurement System: Metric
• Finish: Corrosion‑resistant steel construction
• Design: Fold‑out hex keys with integrated classic steel handle

Applications

The 21171 M17 Hex Key Set is designed for a wide range of metric fastener applications, including:

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

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

Performance & Durability

Each hex key is precision‑formed to meet tight dimensional tolerances, ensuring a secure fit in metric fasteners and reducing wear over time. The classic steel handle provides rigidity and durability, allowing users to apply controlled torque with confidence. Built for repeated use, this set performs reliably in both professional and home environments.

Design & Convenience

The folding configuration keeps all seven hex keys neatly stored in one unit, preventing loss and reducing clutter. Keys fold out smoothly for use and store safely within the handle when not in use. The slim, compact profile allows easy transport and storage, making it ideal for mobile tool kits and everyday carry.

Ideal For

• Professional technicians and mechanics
• Maintenance and service personnel
• Installers and assemblers
• Bicycle and motorcycle enthusiasts
• DIY homeowners and hobbyists
• Toolkits requiring compact metric hex solutions