Kincade One sided Rubber Reins Black. Offering the best quality European leather, the Kincade One sided Rubber Reins are complete with stainless steel fittings giving you quality at a competitive price. With a combination of plain leather on ones side, and a rubber grip on the other, the One Sided Rubber reins provide a secure grip no matter the conditions. Alongside buckle fastenings and a central buckle, the One Sided rubber Reins are a tack room essential.