Axle Release Pro Axle Nut Conversion Kit-M10 x p1.0 Axle Conversion kit for use with bicycle equipped with 10 milimeter diameter axles that have 1 thread per milimeter-Metric threading Brands such as SRAM, NuVinci N360, and other European brands use this threading. Installs in seconds using a #3 hex key (aka: allen wrench) Safest quick release system on the market with two (2) independent cams that ensure a secure connection everytime. Safest quick release system on the market with two (2) independent cams that ensure a secure connection everytime.