Over the years I've had detectors used in the water have problems with the shaft locks that are very prevalent on detectors. They work well on land detectors, but when they get into the water with the silt and salt they bind up; even when rinsed after each hunt with clear fresh water. Had this issue with my Fisher ImpulseAQ limited and Steve has the right part to fix it. Since I still have my Sand Shark and Tiger Shark, I am thinking about changing those two out also, even thought I'm not using either of them much. It is similar to the locks on aftermarket straight shafts that I have on my Excaliburs that work well in the water; silt salt and all. Very pleased to see these available.
Hear is a picture of the new shaft lock in place with the pieces of the old part on the table:
Hear is a picture of the new shaft lock in place with the pieces of the old part on the table: