I have an omega grafting tool. I tried it out and it really didn't increase my chances of a successful take. It might have even lowered my average. On the other hand it did speed up the process. I've found that a sharp knife works the best. A real good tool is a carpenters knife aka a box cutter. Replaceable blade, retracts when not in use, easy to find at the store if you need a new one.
The biggest discovery I've had for grafting figs is to do it when the buds start to push on the mother plant. Then put a plastic baggie over the whole thing to retain moisture.
Good Luck!! Grafting time is approaching!