Product review (4 stars): Simple fix!!!
This was just what I needed.  The dryer belt broke on my dryer as a result of overloading.  The metal part (now I know called a pulley) broke as a result of the strain.  My local parts store wouldn't sell me this and they and mostly all of the online references lead me to believe I had to purchase an entirely new motor when it seemed apparent to me that I only needed a new part to screw on.  This part saved me the cost of a new motor and seems to be more sturdy than the original part it replaced.  So far 4 weeks in with no problems.  I hope this review helps others determine your repair could be a simple fix.