The zero degree/straight clamps that we offer corrects the transducer geometry problem associated with the 8 degree clamp that came with the livescope kit, allowing you to have your sonar image, GPS position and transducer targets lined up.  This improves the accuracy of your readings in vertical and forward/downward mode, making it simple and intuitive to get on the fish you are seeing as well as locate your lure or bait on the sonar screen.