Smart Track Hybrid single blade and housing kit . Single lift line and attachment hardware included. Rudder pedals and steering line are sold separately. This uses the bayonet pin mount. Used on several Stellar touring and recreational kayaks, but can be adapted to others. Standard operation is with spiral spring holding blade up…lift line is down ( but can be modified to lift line up with a little ingenuity). This comes with one blade only , but can be easily exchanged. I have pictured both the single and tandem blades for size comparison. (you only get one) Either of these blades are much bigger than the Smart track blades used on Surf Skis.