Mikmar Combination BitFOR ALL DISCIPLINES. The Combination Bits DISPERSE PRESSURE to the nose, mouth, chin, and poll areas. The light weight design works well for all disciplines. The Combination Bits are VERSATILE, offering different options for leverage and function. You can attach a single rein to 3 different areas on the bit the nose rope, the lower area of the shank or the shank at the corner of the mouth. You can use double reins in combination to any of the 3 areas.