Baum - 1.5 mm Allen Key is a hex key that snuggly fits in a screw or bolt with a hexagonal groove or socket size 1.5mm. Theouter covering in the 1.5 mm Allen Key is the black phosphate. This covering increases friction, enabling the Allen Key to better fit in the hex socket. In addition, the Allen key has one long arm where the force is applied, and the long arm provides a mechanical advantage while delivering force to the short arm. As a result, the Allen keys provide a better fit, which reduces metal removal from the socket.
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