The birzman damselfly extract universal 910 speed chain rivet extractor the unique and graceful standing the inspiration of design originates from the perching pose of damselfly the y shape of the handle is more comfortable and easier to use the body is only around 40g with the material of aluminium birzman damselfly extract universal 910 speed chain rivet extractor features lightweight compact easy to use compatible with 9 10 and 11 speed chains