Replace your clothes dryer's old, worn or damaged knob with this Frigidaire Rotary Knob (131965300). It's a genuine replacement part designed to work with a variety of brands and models utilizing a D-shaped shaft. To swap it out with your current selector, first simply pull the old one off its shaft. Then align this dryer replacement knob's flat edge on the shaft before pressing it firmly into place. No tools or handyman are required.