Some words about Birzman :
"To make maintenance easy, fun and enjoyable, provide the right tool for the job, and share our passion for biking with all riders."
"We believe in giving riders the freedom to express themselves without constraints. Through tireless research and innovation, we produce tools that are durable, supremely efficient and highly innovative. By doing so, we provide riders with the best possible platform to get out there and ride!
Equipped with a built-in rotating tip for square tapered crank arms. The rotating tip makes allowance for ISIS Drive and Octalink crank arms.
Threaded nut includes smoothed ring at head to prevent damage to thread.