Ronstan's popular range of high performance Sealoc turnbuckles can now be fitted with the Sealoc Handle Kit for fast, easy adjustment. This sleek, unobtrusive system was developed and tested in close consultation with some of the world's best sailors. Maintaining optimum rig tension in all conditions has never been easier! Features: Upper Handle: Extruded Acetal for UV resistance and durability. Fluted section for maximum grip. Light weight. Lower Handle 316 Stainless Steel for strength and corrosion resistance. Self locking collar for easy adjustment and re-positioning. Snaps down to lock when not in use. Sleek design to prevent snags. Compatibility: RF1573-05 is compatible with any of the following products manufactured after 1989. RF 1574