Professional's Choice rasp designed bits include this Rasp Shank Snaffle bit.  6" rasp detailed cheek with a 5 1/4" snaffle mouthpiece.  This mouthpiece applies more palate and bar pressure.  The snaffle is an excellent all-purpose mouthpiece that works well on most horses.

Rasp shank snaffle bit

6" cheek

5 1/4" mouth