ToklatMyler HBT Shank with Sweet Iron Low Port Comfort Snaffle MB 04 BitStainless Steel with Polished Sweet Iron Mouthpiece5” HBT Shank5” Mouthpiece89-20045 Stainless Steel 5" HBT Shank with Sweet Iron Low Port Comfort Snaffle (MB 04, Level 2) Copper Inlay. This mouthpiece is made of polished Sweet Iron which naturally oxidizes or rusts. Harmless to horses, it has a sweet taste and promotes salivation. Toklat manufactures and distributes some of the most popular branded equestrian products including Myler® Bits. Toklat top-quality products support a better experience and improved performance for horse and rider.