Product review (4 stars): Excellent fit
Not as pretty as the original knob on my Whirlpool washing machine (which is why I didn't give this five stars), but just as functional and likely to last longer than the machine. The shaft screws into a brass piece on this replacement, not directly into the plastic knob.

Other reviewers said it didn't fit their machines; on my machine, the top section of the original two-piece knob broke off. I had to remove the lower part of the original piece as well to screw this onto the shaft.