The HD Innovations Transducer Adapter gives Humminbird MEGA Live 1 and 2 users a simple way to switch sonar views and dial in their presentation when tracking crappie, bass, walleye, and panfish around brush, weed edges, docks, breaks, and suspended schools. Easy to assemble and compatible with all HD multi-mount transducer mounts, this adapter helps anglers adjust from forward mode to down mode by loosening the transducer knob, repositioning the transducer, and tightening it back into place. Its included black single tooth adapter disk, two rubber washers, and stainless steel 1/4-28 screw with an aluminum red anodized knob create a secure, clean-fitting connection for active sonar setups on boats, kayaks, and ice fishing rigs. Compatible with Humminbird MEGA Live 1 and 2 Fits all HD multi-mount transducer mounts Adjusts from forward to down mode by loosening the transducer knob Includes: Black single tooth adapter disk 2 rubber washers Stainless steel 1/4-28 screw with aluminum red anodized knob Please note: This kit is only needed if you do not have the red knob transducer screw. All X-Over poles include this hardware.