Product review (5 stars): It fixed my dryer not hot enough to dry clothes
I was trying to troubleshooting my dryer. Took a bet to replace this little part and it worked. There are tons of youtube video show you to remove drum and belt to reach out to this part as it's below dryer's drum with a narrow space that you are hardly reach to. I managed to use a small 1/4 wrench to unscrew and replace it. It took me about 15 minutes to complete the job.

Tools I used:
Putty knife & 1/4 wrench