What the hell is that assembly called.. It usually bolts on to the front, it stops the boat has a crank on it and the roller. Had a picture but couldn't get it to upload.
https://www.google.com/search?hl=en&client=safari&gl=us&biw=320&bih=444&tbm=isch&sa=1&ei=sgxiUY_GMqGp2gXfsYGwAg&q=boat+trailer+stop+and+crank&btnG=#biv=i%7C0%3Bd%7CP6HGQkalpMAahM%3A here's a link kinda want something lighter and a bit nicer than that
https://www.google.com/search?hl=en&client=safari&gl=us&biw=320&bih=444&tbm=isch&sa=1&ei=sgxiUY_GMqGp2gXfsYGwAg&q=boat+trailer+stop+and+crank&btnG=#biv=i%7C0%3Bd%7CP6HGQkalpMAahM%3A here's a link kinda want something lighter and a bit nicer than that