Size - 6 Pairs Round shaped 10mm diameters and 6.5mm thickness, 3 mm/0.12 inch metal pin dia.Application - Replacing worn or lost heel tips, fix your favorite expensive heels. Provides a more stable and comfortable walking experience.Material - Made of TPU (thermoplastic polyurethanes) and strong metal pins, anti-slip, durable, and good abrasion performance, provides long using life.Feature - These Shoe replacement tips with a non-slip surface are designed to minimize heel click and reduce walking noise, comfortable, and quiet to wear.Note - Use the specialized tool to remove the broken heel tips, then put the new one into the tip's hole and tighten it, easy to replace.