The Cable guide is the creation of ours that was brought to life by teaming up with Paragon Bike Co. after trial and error. We think we have the recipe down to make these strong and affordable. Please read the packaging. You DO NOT need to gorilla tighten these. We supplied a slightly longer screw than the typical tab ones. This we you get a good amount of threads in. Tighten just until there is resistance. We also put VHB tape on the back just to add another connection point besides just the screw. You get 2 screws and 2 guides. ** FOR SEAT STAY BRAKES ONLY.