The Faithfull 3mm Hexagon Allen Key is a versatile size suitable for a wide range of applications. This is the smallest size to feature size markings for quick identification, making it particularly user-friendly in busy workshop environments. The 3mm size is commonly found in machinery, furniture assembly, bicycle components, and various mechanical applications. Manufactured from fully hardened chrome vanadium steel, this 3mm key provides excellent strength and longevity for professional use. T
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