TEMPORARILY UNAVAILABLE. More stock hoped for around July 2015.
The 3.25mm size fits most high quality spoke nipples, but the 3.45mm size is often needed to true cheaper wheels.
The side with the protruding dots (pictured) is the 3.4mm side, so it's easy to use the correct side while truing a wheel.
Being made from stainless steel, it should be hard enough to give a long service life, and its broad shape makes it comfortable to work with.
We like to use 4-sided nipple keys in the workshop to reduce the chance of nipple rounding or splitting - especially important on tight spokes and/or alloy nipples.