What is Sally’s? Scissors & Dye for WaWa

I just got my WaWa weft and I need to know what to do next before I sew them into clips. I need to run some tests for cutting the hair for the layered look tapered end and dyeing. Need help with this.
I've read people buying some kind of scissors or razor and dye at Sally's. What is Sally's, is it an online store? If I can't get to a Sally's someone know what kind and where to find dye and scissors, and what do these special scissors and/or razor looks like? If I can't find these scissors what's the alternative? I'm very excited.

So far I have the basics to make my own weft clip on's: WaWa hair, clips, nail glue, thread, needle. I think the only thing I'm missing are the scissors and dye (somewhat optional).

Thanks.

You can dye the wawa - sort of. I'm expermenting with the 613 (another brand of thermofibre, actually) right now. I'll post picture and give details tonight. I'm off to work right now.