【Application】Perfectly fit for all Helix 10 models, all Helix 9 models, and all Helix 8 models. 【Function】Designed to secure the control head on your boat. You can adjust the control head to a desired viewing angle, and ratchet teeth in this gimbal bracket provides a positive grip to reduce the screen shake, ensuring operators can read the display screen clearly. 【Installation】This kit comes with instructions for easy installation. 1) Mark and drill four mounting screw holes using a 5/32” (4 mm) drill bit. 2) Place the mounting bracket, fill the mounting holes with marine-grade silicone sealant. 3) Place one flat washer onto each #10 x 1” wood screw. Insert and tighten the four screws into the mounting holes. 4) Install and adjust the control head, then hand tighten the gimbal knobs (with washers) until the assembly is secured. 【Material】Made of premium quality materials with black coated for rust and corrosion resistance. This bracket can tightly secure the control head and hold up to years of abuse in most demanding marine environments. 【Package】Comes with 1x mounting bracket, 2x rubber washers, 2x gimbal knobs, 4x screws and washers. 【Satisfaction Guarantee】If you're not satisfied with the product, simply return it for a refund in 30 days. We support 30-day refund for return and 12-month warranty. Fit for Hummingbird Helix-5 Series.