This SS PowerTech prop can be used on Yamaha, Mercury or Honda with the Cushion Lok hub which can be purchased separately for about 50 to $80
Righthand rotation (clockwise)
It works with Gen1, Gen2 or Gen3 versions of Cushion Lok hubs.
The cushion lok hub system helps protect your lower unit should you ever hit a solid object with your prop blades. I personally will not run anything other than powertech propellers using the cushion lock hub system, it's just cheap insurance and piece of mind given you never know what's lurking out there.