The Door Handle is an OEM replacement part for Whirlpool built-in microwaves. For black order 4393782. Causes of failure include cracking or loosening of plastic mounting brackets over years of use. Handles also face heat exposure during each use cycle that can stress materials sooner. Symptoms of a problematic handle are: Looseness preventing door latching Difficulty opening the microwave without two hands Discoloration, cracking or breakage at stress points This is a genuine Whirlpool OEM replacement this part is also compatible with Maytag, Jenn-Air and some KitchenAid models.4393777 (AP3033588) replaces 4393733, 588286, AH373722, EA373722, PS373722.