THICK & SOFT PU LEATHER ADVANTAGE - As you know, it's hard to hold a macho badass dog.Always the leather is ripped when you walking or training with them. This soft thick PU leather will get you out of the misgivings DOG NECK DEFENDER BY SHARP RIVETS - The most bothersome situation is your pet get out of your control and attacked by others. The sharp spikes will make he or she get all jacked up before you can do anything. CHORMED D-RING FOR LEAD ATTACHING - A heavy duty D-ring which studded by for mushroom reviets plated for leash attachment,sturdy enough for walking or training dogs ATTENTION - For the rivets are accurately sharp, it's not safe for dog wearing while playing with your children.Please take a good control of your dogs while waering this collar TO TAKE A CORRECT MEASUREMENT - Please taking a proper correct neck circumference measurement before you order. Make it as the instruction as picture says. If you're not sure, you can contact us and we will give you timely and professional response.