3 Pairs U shaped 8x8mm size and 6.3mm thickness, 2.4mm metal pin dia.Made of TPU (thermoplastic polyurethanes) and strong metal pins, anti-slip, durable, and good abrasion performance, provides long using life.These Shoe replacement tips with a non-slip surface are designed to minimize heel click and reduce walking noise, comfortable, and quiet to wear.Replacing worn or lost heel tips, fix your favorite expensive heels. Provides a more stable and comfortable walking experience.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.