l Usage - Easy to replacement, use specialized pliers to put out the old heel tips, then put the new one into the tips hole and tighten it, it will protect your high heel effectively. l Comfortable Safe and Reduce Noise - Anti-slip diamond surface design, increase stability and safety while walking, wearing feel comfortable, safe and quiet. l Quantity - Black 2.4mm pins 10 pairs(each size 2 pairs), black 3.0 pins10 pairs(each size 2 pairs). l Size and Measurement - U-Shaped 5 different size 8*8mm, 9*9mm,10*10mm,11*11mm, 12*12mm. l Material - heel tips are made of high quality CPU and strong metal pins, anti-slip, durable and good abrasion performance, the hard metal pin flower top design, not easily broken.