Seems similar to the Prop Pulse Props made in Sweden, if so, what's nice is that can adjust the pitch in various sizes, excellent for : if varying loads, faster hole shots, pulling skiers, cruising ,etc. The down issue is that blades are hardened composite plastic, will break if hitting hard against something out or underwater. What's cool is that can buy extra blades as spares, remove the broken one, install a new in and keep boating....
Happy Boating