Made from carbon steel with hardened Adjustable open up to 5 inches wide and are recommended for square tooth clutch hubs 8mm spanner pins on the back can also be used to hold flywheels,, gears Used to hold the inner clutch hub, which is necessary for removal and installation of the clutch hub and clutch basket Fit for motorcycle atv dirt bike flywheel sprocket gear hold, Manufacturer: Tsophreniq