Omniflex Universal Joint
Omniflex tiller extension flexi joint system is manufactured from an elastomeric polymer of the highest quality, as used on sailboard masts and industrial hinges.
Completely omni-directional in operation and capable of many millions of flexures without failure.
Your extension can be completely removed for security reasons or to allow swaping simply, by unclipping the cap and sliding the universal joint out of the base. For greatest longevity store your flexi joint in it's natural position (not bent) either by positioning it that way or remove the extension from the tiller.
To fit 16mm tube, internal diameter must be 13mm and fitted with rivet, screw, bolt
Is compatible with the Allen pro universal joints.
Note that the image showing how it fits to a round tiller is using a round to flat saddle