Lost your coupler for your TM-1000 / Traxstech Transducer Mount ?
Want an extra one for your pole to vary in depths?
The pole has a collar system on it that tightens up to the pole and can be adjusted up and down to the depth you need in the water.
With extra couplers you can preset numerous depths and make changing depths easier while out fishing.
It sets into the arm yolk and the collar locks into place with a dovetail system that slides in and locks it into place while you are trolling or moving.