The TM 12 is a 2 piece twisted wire snaffle on a long gag. This bit is wonderful for getting flexion on your colts. I don’t mind starting rope horses in it or working a 2 or 3 year old after they come out of a snaffle in it. While you can ride this bit with a curb, in my opinion, it rides better without one. I think this is a really nice colt bridal.