How does the Fendergrip grab the fender line?
The side with the push button houses a pivoting cam that is biased by a stainless steel compression spring. The cam is coupled to the push button so that when the button is pushed, the cam releases the line. When the button is released, the spring naturally sets the line in place. Want to see the inside of a Fendergrip? Go to the Fendergrip cutaway picture.