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WW Ergonom Pro ExtremErgonomic crank shaft with 3D profile blades. The paddle has only one joint that is at the centre of the shaft secured with an external aluminium tube. The element from the shaft centre to the blade tip is made in one single piece in one mould. This allows the perfect ergonomic crank angles to be designed. The single piece is also extremely strong & durable. The 3D profile blade generates lift by pressure differentials just like an aeroplane wing hence it is a super efficient powerful & elegant instrument. |