Klein Tools 70550M Pro Folding Hex Key Set – 10 Metric Sizes 1.5–12mm

Premium hex key solution for professionals

The Klein Tools 70550M Pro Folding Hex Key Set blends rugged durability with thoughtful design to support demanding tasks. Built with heat-treated alloy steel and housed in a reinforced nylon handle, this 10-piece kit is designed to withstand daily use while offering a comfortable grip and reliable performance through long sessions.

Designed for practical, real-world work, the set features extended blades that reach from 3-1/2 to 4-1/2 inches. This extra length helps you access fasteners tucked away in tight or awkward spots, reducing the need to contort or reposition tools mid-task. The result is smoother turning and increased leverage when torque is required, without compromising control.

• Extended reach: blades extend from 3-1/2 to 4-1/2 inches for greater leverage
• Ten metric sizes: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm
• 270-degree range: each blade can open independently to work at unusual angles
• Square cut ends: full-depth contact to minimize slipping and stripping
• Heavy-duty nylon handle: reinforced grip designed for comfort and durability
• Rust-resistant blades: heat-treated alloy steel with protective coating for longevity

A smart outer-body feature is the convenient #2 Philips fastener used to adjust key tension. This small, simple control lets you fine-tune feel and tension to suit your project, helping maintain steady turning and reduce tool wobble during delicate tasks.

Color-coding further boosts efficiency at a glance: red identifies inches, blue marks metric sizes, and green signals Torx tools. In fast-paced work environments, quick visual cues can help you grab the right tool faster and keep momentum going.

With a heritage dating back to 1857, Klein Tools has built a reputation for professional-grade hand tools that prioritize performance, durability, and precision. The 70550M lineup reflects that legacy, offering a reliable, practical hex key set for professionals who value quality and consistency. It’s a practical option to consider for automotive, cabinetry, machinery, and electronics work where reliable hex keys can make a positive difference. While results can vary by task, the combination of extended reach, tens sizes, and user-friendly tension adjustment presents a credible potential for smoother workflows and reduced hand strain during extended jobs.