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Hex Keys
Hex keys (also known as Allen keys) are designed to be used in conjunction with threaded bolts with a six-sided (hexagonal) internal drive wrench head which the hex key is inserted. A variation to hex key is the hex wrench, typically a star-shaped 3-way wrench which enables better grip and more torque to be placed on the hex bolt. Hex keys are affordable, small, lightweight and enable better tightening of hex bolts which are commonly used on bicycles.
