Deda, 'Dog Fang' chain catcher. When fitting there is a little leeway with the length of the nut and bolt.
Deda Dog Fang Chain Drop Guide Bicycle Bike Chain Catcher 28.6mm - Black
Deda Dog Fang Chain Drop Guide Bicycle Bike Chain Catcher 31.7mm - Black
Deda Dog Fang Chain Drop Guide Bicycle Bike Chain Catcher 34.9mm - Black
Deda Elementi Dog Fang Classic Chain Protector In Black All Sizes
Dog Fang 34.9mm
Dog Fang 31.7mm
