Trust Sweet Iron Kimblehook Waterford BitThe kimblehook jaw piece is a kind of pelham but has a milder effect and is ridden with one rein. The rider can determine the sharpness of the bit himself. The lower the rein is attached, the greater the leverage, the sharper the bit. This jaw piece offers the rider more control over the horse than a standard jaw piece. The kimblehook is not suitable for inexperienced riders. The Sweet Iron bits are made of steel and have a recognizable blue color.