Do you know the original purpose for the spiked collars? They were to protect the neck of a dog guarding a flock from predators. When a large predator went after the dog, it would get a mouthful of spikes.
If you are going to put that collar on a Pit, please don’t. Those dogs have a bad enough image from the media without you perposely adding to it. Making your dog look more “macho” is not a good reason either.

imosh.com sells some nice collars and also a few types of spikes to make your own.

well, also depending on the size of the dog. you can try to ask a worker at petco or petsmart where they get their collars and ask the company to order the spikes. i think you might beable to order them on the internet. you could try like little plastic cheap ones at nobbies too.

I hope the spikes will be pointing outward the collar not inward

i bet you can fid somthing in joans or micheals or any craft store

Wow…2 inches? Are you sure? That’s going to come out really long and not only will the dog get hurt by them, but so will you and any furniture he walks by…try 1 or 2 cm. That’d at least be decent.

Try searching online, that’s where I get rhinestones and studs to make things with. There are tons of online stores.