The original mast step by Riley Yacht products is back!Universal Joint - rope flex joint for use as a Kayak Sail mast mount.

This is the red tiller mount that can be used to attach Flat Earth Sail mast

The bottom part of the mount screws into your deck (deck should be reinforced) and the top part twists off.

Fits tubing with inside diameter of approx. 13mm. Screw centres are the same distance apart (~33.5mm) as the Pacific Nylon / Ronstan product.