The RAILBLAZA Transducer Arm XL is designed for kayaks and canoes with high freeboards, and dinghies with a solid transom allowing easy retraction and removal of the depth sounder transducer. With this kit, you can install and uninstall your fish finder transducer in a matter of seconds. No messy adhesives or excessive drilling of fittings required. With an extensive selection of RAILBLAZA Bases (not included), this arm can be easily adapted to fit any kayak, canoe, or dinghy either track mounted or hard mounted. *Note: This transducer arm does not come with a RAILBLAZA StarPort Base. Those must be ordered separately.