honestly a tom thumb is alot less harsh than that bit, the twisted wire is ridged and will rub the tongue and mouth rough, along with the rawhide noseband (which is also rough...) with a tom thumb and a curb chain all you have to have is really light hands and it is alot less harsh than this one. But that's just my opinion and everyone had different opinions. I myself prefer curbs. But I also know how to use them. I say use your snaffle. And throw that thing in the garbage.
That is THE most unbalanced piece of trash bit out there. While Im not a fan of combos, I would gladly use one before a nutcracker TT.