This double jointed pelham bit is often used to help control. The double joint with copper lozenge will soften the nutcracker action and assist with salivation. Stainless steel is the most common material for bits, known for its durability, ease of cleaning, tastelessness, and resistance to rust. Copper in the mouthpiece is incorporated to create warmth and encourage salivation, keeping the horse's mouth soft. Available sizes include 4.5", 5.0", 5.5", and 6.0". Mouthpiece thickness is 16mm. Cheek height varies: 125mm for 4.5", 130mm for 5", and 140mm for 5.5".