1/2 inch silver spikes (100 to 200) from StudsandSpikes.com
I've always wanted a spiked collar blazer...I was thrilled when I found studsandspikes.com, they had everything you can imagine when it comes to studding/spiking DIY. I've had this black blazer since I can remember so here was my first project attempt at spiking...I went with the silver 1/2 inch ones, which you just screw on. Really that easy!
You will want to use leather or denim type fabric for these since they are heavy duty.