Myler 04 Three Ring Combination Bit Level 2 Independent Side Movement Patented swivel purchase moves independently of both the mouthpiece and shank so that it doesnt dig into the horses cheek when neck reining Leather noseband.From The Level Best for Your Horse by Dale, Ron and Bob Myler. Toklat Originals, Inc. Very little if any leverage when using the middle rein position Mild leverage when using the bottom rein position