An ablation system and a method of its use. The system includes a first elongated ablation component carrying a longitudinally extending mechanism for delivery of ablation energy along its length, and a second elongated ablation component movable relative to the first ablation component. The first and second components are provided with a mechanism mounted to and extending along the first and second components for magnetically attracting the first and second components toward one another along the length of the first mechanism for delivery of ablation energy. Preferably, the second elongated ablation component also carries a longitudinally extending mechanism for delivery of ablation energy along its length.