Cable Thimbles - TOOGOO(R) Stainless Steel 4mm Wire Rope Cable Thimbles Silver Tone 25 Pcs Made from stainless steel for maximum corrosion resistance and durability. Designed to prevent crushing or overstressing wire rope at the terminal end which is used to protect the eye of a wire rope or sling. Help to keep cable from flatting around the eye causing the cable to weaken. Ideal for marine and industrial rigging and wire rope applications