Collegiate Cheltenham Gag Cheek Pieces Black. The Collegiate Cheltenham Gag Cheek Pieces are made from the finest quality European Leather and fitted with stainless steel fittings giving you optimum quality and durability. These Cheek Pieces pair nicely with the Collegiate Bridle range and fits all Cheltenham and running gag type bits. The Cheek Pieces offers easy to use screw fastenings and is perfect for replacing worn out or broken pieces or for easy customisation.