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!
2.8mm and a 2.2mm pin for heavy-duty use, for use on bottom bracket cups and freewheels.
8mm for bottom bracket cups. 2.2mm for freewheels.
Reverse the tool to alternate between bottom bracket and freewheel use.