TRUST Sweet Iron Dee Ring Locking Single Joint SnaffleThe locked mouthpiece resembles a single jointed bit, but it doesn't fold like a regular single jointed bit. When pressure is applied to the reins, the bit locks, turning into a double jointed bit and becoming a sharper bit. With less pressure on the reins, the bit reverts to a single jointed bit. This makes it an ideal bit for horses that resist the hand and move through the hand. This bit is not suitable for inexperienced riders. This cheek piece