Birzman Damselfly Universal Chain Tool. The baby brother of the Dragonfly tool – and a design award winner in it’s own right. 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. BMX and Single speed chain specific, 3/32” and 1/8” Single Speed Chain and 9/10 and 11 speed chain compatible. Innovative spring secures the chain during breaking and makes it easy to drive the pin out accurately and easily. Rivet Pin is replaceable.