Thimbles are the connection between the anti-torsion calbe and the free flying sail furler. As often as possible, use or require from your sailmaker to install ours that fit exactly our furling units and will help on the performance and lifespan of your furler. The new Cableless thimbles are perfectly suited to the new generation of sails without anti torsion rope or cable and are compatible with all furlers … including those of our competitors.