The RNF bit, also known as a Kimblehook, is a hanging D with a chin strap, is similar to a Pelham but with a gentler effect when used with a single rein. The RNF features three attachment options for the rein, with the lower rein placement resulting in greater leverage and a sharper bit. The RNF bit provides the rider with increased control over the horse when compared to a standard side piece. Proper education and technique are crucial to ensuring the safety and comfort of both the horse and rider.