COOL LOOKING: The adjustable dog collar with many spiked rivets as decoration, cool and fashion, making your pet more attracitve. It's suitable for kinds of dogs like Bulldog,Mastiff Poodle,Pitbull,Lab,Doberman,Boxer,Beagle,Shepherd etc. ANTI-BITE SPIKED RIVETS: The protective studded dog collar designs many anti-rust alloy mushroom rivests on strap belt to protect your dog's neck get hurt from other dogs. And it adopts advanced drilling technology making the spikes are embedded in the belt, so they will not protrude from the surface of the collar and will not fall off. Strong enough for lasting long use. PREMIUM MATERIAL: Our spiked dog collar is made of high quality PU leather, which is comfortable to wear, durable and wear-resistant, not inferior to genuine leather. Thickened belt is very sturdy and not easy to break by pull or bite force. ADJUSTABLE TO WEAR: The PU leather dog collar has five holes on collar for adjustment, which can adjust the length of the collar to comfortable fit without strangling for the dog's neck. Good sized metal D-ring fits perfectly with almost all dog leashes, name tag and rings, it is very durable. SIZE AND COLOR: There are 4 sizes and 5 colors for you to choose, please measure accurately for your pet's neck girth and choose according to our size chart on pictures before purchase.If you have any problems please feel free to contact us.