This classic bit is a popular hunter/jumper choice.
Long cheek pieces prevent the bit from sliding through the horse's mouth, and help provide lateral guidance by placing more pressure on the sides of the horse's head. Rounded edges where the mouthpiece meets the rings prevent the bit from catching the corners of the mouth. This classic style is popular with many disciplines especially the hunter/jumper and casual English riding crowd.
Always wash a bit after each ride. Remove from bridle and soak in hot water. Use small brush to remove residue. Dry with clean towel.