The TOUGHSERIES Fractional Folding Hex Key has the reliability, durability, and control skilled trades need for both precise and heavy-duty applications. Tackle tough jobs using professional-grade S2 keys that deliver high endurance, torque, and 40% less twisting*. Get performance you can depend on with a durable construction and black nickel coated keys that provide 10X corrosion resistance**. Utilize the convenience of a push-button to lock keys in place at 90°, 135°, and 180° during use.

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