Collegiate Flexi Grip Reins Black. The Collegiate Flexi Grip Reins are made from the finest quality European Leather and is fitted with stainless steel fittings giving you optimum quality and durability. The Flexi Grip reins also feature a hook and stud billet attachment for extra durability and security whilst offers superb grip and are extremely flexible. These Flexi Grip Reins pair nicely with the Collegiate Bridle range and is perfect for replacing worn out or broken pieces or for easy customisation. Please Note: The 54 reins may not come with leather stoppers as shown in the picture.