An excellent option to consider when having wheels built if you use your wheels hard or where total reliability is important. Loctite Threadlock is used to prevent spokes from loosening yet it will still allow spoke tension tobe readjusted in the future. The nipple flats are accurately machined to ensure a perfect fit with a nipple key. Made from brass with a black electroplated finish for extra surface hardness. For long life strength and hardness DT nipples are chosen by the world's best wheel builders. Suitable for 2 mm diameter spokes with a standard 12 mm length.