A hex key, Allen key or Allen wrench is a tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal socket in the head (internal-wrenching hexagon drive).
Always be ready to quickly fasten a screw or a bolt on your cycle, motorcycle or its parts. With 3 hex key wrenches in different sizes, this set makes it easy to swiftly tighten hex nuts.
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