CNC Machined Aluminum mount to hold your electronic units in place.
Stainless detents hold it were you put it and it stays.
Predrilled and tapped to fit most Humminbird ,Garmin and Lowrance electronics.( WILL NOT FIT HELIX 7 model)
Four arm lenghts to choose from  6'' 8'' 10'' and 12''
No More ALUMINUM KNOBS . Stainless steel bolts. Tighten up with a 3/8 allen wrench. Once they are tight the WILL NOT lose their position.   This mount works ideally on the deck. 

Single Monitor Deck Mount 6''